“The crisis”, the economist Rudiger Dornbusch once noted, “takes a much longer time coming than you think. And then it happens much faster than you would have thought.” A similar dynamic describes the progress of Conservative austerity politics.

The stunning failure of Theresa May in last week’s general election has been interpreted by Tory MPs as a warning that the public have had enough of spending cuts. Though the deficit still stands at £50bn and the national debt is £1,700bn (and rising), austerity is over, we’re now told.

So Tories who have spent the past seven years lecturing us on the paramount importance of eradicating the deficit for the good of future generations, suddenly, fall silent on the subject. Politicians who have tarred critics as criminally irresponsible for suggesting an increase in public borrowing have now, in an instant, changed their tune.

UK news in pictures Show all 50 1 /50 UK news in pictures UK news in pictures 18 September 2020 A model presents a creation during the Bora Aksu catwalk show at London Fashion Week 2020 Reuters UK news in pictures 17 September 2020 World kickboxing champion Carl Thomas during his attempt to run a marathon while pulling a plane at Elvington Airfield near York. The attempt is raising funds for Ollie's Army Battling Against Battens, an organisation campaigning to raise GBP 250,000 to fund a clinical trial aimed at saving the sight of children with CNL2 Batten Disease PA UK news in pictures 16 September 2020 Labour deputy leader Angela Rayner speaking during Prime Minister's Questions UK Parliament/AFP/Getty UK news in pictures 15 September 2020 People enjoying the autumn sunshine as they punt along the River Cam in Cambridge PA UK news in pictures 14 September 2020 Early morning light bathes the skyscrapers of the City of London, at the start of a week in which the UK is expected to bask in temperatures of more than 30 degrees PA UK news in pictures 13 September 2020 England celebrate after they dismissed Australia's Alex Carey to win the second ODI match of the series at Emirates Old Trafford, Manchester PA UK news in pictures 12 September 2020 Protesters outside BBC Broadcasting House in central London, as marches and rallies form across the country calling for a 15% pay rise for NHS workers and an increase in NHS funding PA UK news in pictures 11 September 2020 An empty migrant dinghy floats off the beach at St Margaret's Bay after the occupants landed from France in Dover Getty UK news in pictures 10 September 2020 A view of small boats thought to be used in migrant crossings across the Channel at a storage facility in Dover, Kent PA UK news in pictures 9 September 2020 EU's chief negotiator Michel Barnier, left, arriving from the Eurostar with EU Ambassador to the UK, Portuguese diplomat Joao Vale de Almeida at St Pancras International railway station, London, for the latest round of the negotiations on a free trade deal between the EU and the UK PA UK news in pictures 8 September 2020 Dawn over Coquet Island, a small island off Amble on the Northumberland coast PA UK news in pictures 7 September 2020 A hovercraft arrives to Southsea, Hampshire from the Isle of Wight PA UK news in pictures 6 September 2020 Forensics officers near the scene of multiple reported stabbings in Birmingham Reuters UK news in pictures 5 September 2020 Anti-migrant protesters demonstrate in Dover against immigration and the journeys made by refugees crossing the Channel to Kent PA UK news in pictures 4 September 2020 Activists take part in a demonstration against the HS2 hi-speed rail line outside the Department of Transport AFP via Getty UK news in pictures 3 September 2020 Peter Baker, who plays Trigger in the musical version of Only Fools and Horses, sweeps the stage of the Theatre Royal Haymarket in London, after observing a 15 minute silence to show solidarity with those in the theatre industry that have lost their jobs due to the coronavirus pandemic PA UK news in pictures 2 September 2020 Kadie Lane, right, 11, and Brooke Howourth, 11, hug on their walk to Marden Bridge Middle School in Whitley Bay, Tyne and Wear, for their first day of term, as schools in England reopen to pupils following the coronavirus lockdown PA UK news in pictures 1 September 2020 Extinction Rebellion protesters sitting outside The Houses of Parliament in Westminster, London PA UK news in pictures 31 August Surfers at Long Sands Beach, Tynemouth PA UK news in pictures 30 August Black Lives Matter protesters march through Notting Hill in London in the first Million People March EPA UK news in pictures 29 August A protester reacts as she demonstrates against the lockdown and use of face masks, amid the coronavirus disease outbreak, outside Downing Street in London Reuters UK news in pictures 28 August Caribbean soca dancers display their costumes as they promote the first ever digital Notting Hill Carnival, following the cancellation of the normal Carnival festivities due to the continued spread of the coronavirus disease, in London Reuters UK news in pictures 27 August Father and son team Chris and Sam Milford from historic building conservation specialists WallWalkers begin restoration work on the spire of Norwich Cathedral, which stands at over 312ft high. The first known spire was completed in 1297 PA UK news in pictures 26 August Giant waves at Seaham in County Durham, as the bad weather continues PA UK news in pictures 25 August An assistant at the Wallace Monument cleans the case which houses the William Wallace sword in the Hall of Arms room at the monument near Stirling as they prepare to re-open PA UK news in pictures 24 August Restored World War Two landing craft LCT 7074 is transported from from the Naval Base in Portsmouth to its final resting place at the D-Day Story at Southsea PA UK news in pictures 23 August Jenny Nguyen and Tony Cao, from Vietnam, pose for wedding photos on Tower Bridge in London, as it remains closed to vehicles after it was stuck open on Saturday due to a "mechanical fault". The landmark's Twitter account confirmed only pedestrians and cyclists could use it on Sunday morning PA UK news in pictures 22 August England's Zak Crawley hit 267, joining the exclusive Double Hundred club, on day two of the Third Test match against Pakistan at the Ageas Bowl, Southampton PA UK news in pictures 21 August Harri Teale gathers lavender during the annual harvest on the Wolds Way Lavender farm near Malton in North Yorkshire PA UK news in pictures 20 August Parents and a student react after checking GCSE results at Ark Academy in London Reuters UK news in pictures 19 August Tate Modern workers hold a strike outside the gallery in London, to protest the institution's announcement that it would cut more than 300 jobs from its commercial arm, Tate Enterprises PA UK news in pictures 18 August Two rescued brown bear cubs, Mish (left) and Lucy, cool off in a pool after arriving at their new home with the wildlife conservation charity Wildwood Trust in Herne Bay, Kent. The orphaned pair, who have been living in a temporary home in Belgium since they were found abandoned and alone in a snowdrift in the Albanian mountains, will be acclimatised to their new life in the country before moving to a permanent home PA UK news in pictures 17 August A level students celebrate outside the Department for Education in London after it was confirmed that candidates in England will be given grades estimated by their teachers, rather than by an algorithm. The government U-turn comes just days after Education Secretary Gavin Williamson vowed there would be "no U-turn, no change. PA UK news in pictures 16 August Wasp players take a knee as Northampton Saints stand prior to kick-off in their Premiership match at Franklin's Gardens PA UK news in pictures 15 August Piper Colour Sergeant Lil Bahadur Gurung attends the VJ Day National Remembrance event, held at the National Memorial Arboretum in Staffordshire, Britain Reuters UK news in pictures 14 August People including students hold placards on Whitehall outside Downing Street as they protest against the downgrading of A-level results. The government faced criticism after education officials downgraded more than a third of pupils' final grades in a system devised after the coronavirus pandemic led to cancelled exams yes AFP via Getty UK news in pictures 13 August Benita Stipp (centre) and Mimi Ferguson (left) react as students at Norwich School receive their A-Level results PA UK news in pictures 12 August 2020 A train derailment near Stonehaven has left three people dead. Driver Brett McCullough, conductor Donald Dinnie, and a passenger were killed when the 6.38am Aberdeen to Glasgow Queen Street service crashed amid heavy rain and flooding BBC UK news in pictures 11 August 2020 A woman hydrates in the sun after open water swimming at the West Reservoir Centre in north London Tolga Akmen/AFP via Getty UK news in pictures 10 August 2020 Prime Minister Boris Johnson takes part in an archery session as he visits Premier Education Summer Camp at Sacred Heart of Mary Girls' in Upminster Reuters UK news in pictures 9 August 2020 People cycle through Cambridge as the heatwave continues in Britain EPA UK news in pictures 8 August 2020 Healthcare workers take part in a protest in London over pay conditions in the NHS Getty UK news in pictures 7 August 2020 Emergency services make their way along the seafront on Bournemouth beach in Dorset on one of the hottest days of the year PA UK news in pictures 6 August 2020 Alison Murphy poses for a picture by husband Peter as she walks through a field of sunflowers in Altrincham, Cheshire PA UK news in pictures 5 August 2020 Pakistan's Abid Ali being bowled by England's Jofra Archer during day one of the First Test match at the Emirates Old Trafford, Manchester PA UK news in pictures 4 August 2020 The 'Timbuktu tumblers' from Kenya perform their balancing act on the Southsea waterfront as Zippos Circus reopens in Portsmouth Rex UK news in pictures 3 August 2020 Pelicans interact with a visitor in St James's Park in London PA UK news in pictures 2 August 2020 Lewis Hamilton drives with a puncture towards the finish line to win the Formula One British Grand Prix at Silverstone POOL/AFP via Getty UK news in pictures 1 August 2020 Arsenal's Pierre-Emerick Aubameyang celebrates with the trophy and teammates after winning the FA Cup, as play resumes behind closed doors following the outbreak of the coronavirus disease Pool via Reuters UK news in pictures 31 July 2020 People enjoy the sunny weather at a Bournemouth Beach Reuters

People who insisted that if we did not balance the budget at the earliest possible date Britain was destined to become an economic basket case, like Greece, apparently no longer fear such a gruesome outcome. The collapse of the citadel of austerity is truly remarkable in its rapidity.

But it was a very long time coming. It became clear within a year of George Osborne’s 2010 “emergency budget”, which forced through huge cuts in capital budgets and an intense squeeze on Whitehall departments and welfare spending, that the austerity medicine was hurting, not helping.

The economy was flatlining, teetering on the verge of recession. Whether this was primarily due to the crisis in the neighbouring eurozone and a spike in global oil prices or because the negative knock-on impact of the government’s domestic spending cuts was bigger than initially thought is still debated by economists.

But it doesn’t really matter. Even the conservative estimates of the Office for Budget Responsibility suggest that GDP growth would have been around one per cent higher in both 2010-2011 and 2011-2012, if the Coalition government hadn’t slashed domestic spending on the scale and pace it did.

With interest rates as low as they could go and the Bank of England struggling to support demand through money printing, this was a time for the Government to ramp up capital investment spending to offset the general slowdown – something numerous distinguished academic economists, and even the IMF eventually, urged. It would have made us all better off, putting idle resources to use.

But despite such a capital spending stimulus being permitted under his own fiscal rules, the former Chancellor George Osborne refused to do it. He told us that the international bond markets would lose confidence in the UK’s creditworthiness if we deviated from his original plan – a risible claim given that UK borrowing costs were plumbing new depths as investors around the world ploughed money into government bonds.

General Election 2017: The final results

The reality was that Mr Osborne didn’t want to do it because it would have meant losing face. He would have had to admit that his previous pigheaded insistence that he didn’t need a fiscal “plan B” was wrong. The credibility risk was not to the UK’s borrowing status but his own political stock.

With the help of a cynically conceived and distorting subsidy to the housing market, the Conservatives managed to eke out a surprise victory in the 2015 general election. Drawing the lesson that austerity had become an electoral asset and useful stick with which to beat Labour, the Chancellor doubled down. He tightened his fiscal rules in a way that virtually the entire economics profession regarded as economically illiterate, making no distinction whatsoever between day-to-day government spending and productive capital spending, and also unveiled a round of large welfare cuts for the working poor.

Hubris set in. And nemesis soon followed. Unexpected parliamentary resistance mounted to Osborne’s welfare cuts, prompting a humiliating reversal on tax credits. At the same time the impact of extensive cuts to policing, schools, social care and the NHS finally became apparent in the form of deteriorating services. It took longer than expected, but it finally arrived.

Yet when Theresa May replaced David Cameron as Prime Minister and Philip Hammond replaced George Osborne as Chancellor last year, they didn’t reverse any of the inherited departmental spending or welfare cuts. And they went into the 2017 election with the same old scare stories about Labour’s reasonable capital investment plans, the same old specious lines about there being “no magic money tree”. Even though interest rates are still at rock bottom and businesses are facing monumental uncertainty due to Brexit, they were still planning to suck demand from the economy. Only now has the dam of Conservative denial crumbled.

Reducing the UK’s deficit, which had ballooned to 10 per cent of GDP in 2010 due to the financial crisis, was a necessity. Cutting it without regard for the state of the overall economy and the feedback effects on aggregate demand was unscientific stupidity and wanton vandalism. Austerity, as practiced by the Conservatives, was a policy driven not by economics, but by politics and ideology. The politics was baiting Labour. And the ideology was the desire to reduce the size of the state.

Who was to blame? The prime culprits were George Osborne and David Cameron of course. But Treasury civil servants were also enthusiastic supporters. It was enabled by two senior Coalition Liberal Democrats, Nick Clegg and Danny Alexander. It was endorsed by economists in the City of London and cheered on by Tory-supporting newspapers. It was abetted by ostensibly neutral political journalists, who unthinkingly succumbed to the fatally misleading idea that a government’s finances can be compared to a household’s budget.

They say victory has a thousand fathers whereas defeat is an orphan. But if we look carefully it’s clear the austerity failure of the past seven years has a sprawling parentage.