Traditionally, governments accepted that they were only temporary custodians of power. And that their power was circumscribed – by Parliament, the civil service, the courts, local governments, and even the media. They tried to work within those constraints. Mrs Thatcher got extremely annoyed when these institutions stood in her way. Not always, but for the most part, even the Iron Lady accepted their constitutional right to do so.

We can’t blame the international economy, or terrorism, for the state we’re in. As I explain in my new book, The Rotten State of Britain , it’s rooted deep in the psychology of New Labour.

Strikes, stagflation, even snow – it’s like the 1970s all over again. It took Mrs Thatcher to pull us out of that mire. Unfortunately, Gordon Brown seems to have bought us a return ticket.

How did we get into such a state? We’re spied on by the world’s biggest array of CCTV cameras. We’re bullied by the world’s most expensive police force, who are quite willing to arrest us for dropping an apple core. We seize the assets of our best friend in Europe – Iceland – under anti-terrorism law. Nannying officials say we can’t feed our dogs grapes or give our kids a sip of wine. The average worker has to save 60 years to get the same pension that an MP clocks up in just 13. The government’s total liabilities are three times the national income. The IMF says we’re the country least well placed to survive the downturn, not the best, as Gordon Brown insists.

Dr Eamonn Butler is director of the Adam Smith Institute and author of The Rotten State of Britain , which is published on Tuesday by Gibson Square Books. The book offers a damning account of what the successive Labour Governments have done to Britain over the last twelve years and here he looks in particular at the perils of the state having accrued increasingly draconian powers.

New Labour blew this consensus apart. Labour had suffered terribly through its long war between those who wanted to cherish its socialist ideology and those who wanted to get it elected. It had seen what happened to John Major when he too faced a fractious party, airing its disputes in public. New Labour’s new principle, and what got it elected, was control. It would be crisp, businesslike, and united. It would achieve that by having strict central control over policy and action. Dissent would not be tolerated.

It won the campaign. And New Labour thought that the same principles would win government as well. All policy was cleared through Downing Street. The civil service press officers, who prided themselves on being independent, were replaced by ones who would stay on message. MPs and ministers who muttered any doubts were humiliated, briefed against, and demoted. The press was taught to follow the line by being rewarded with inside information and interviews for helpful pieces, and being frozen out for harmful ones.

You have to hand it to Peter Mandelson, Alastair Campbell, Tony Blair and the others. The machine they created was brilliantly effective. Nothing stood in their way.

But leaders need someone to stand in their way, to challenge them, to restrain their excesses. Otherwise, they soon use their power to serve their own whims and interests, rather than the public good. Today, power is concentrated in Downing Street – with Gordon Brown and eighty-odd unelected, unaccountable Party appointees. Parliament is powerless, because so many MPs owe their ministerial careers and pensions to Gordon Brown’s patronage. Debates are routinely guillotined: but the government has the votes, so why talk? The civil service is told what to do by Party officials: civil servants know that their careers too depend on following the line. Even the judges are slapped down by ministers if they deliver unwelcome verdicts – something that politicians would once never dare to do. The entire apparatus of the state has been subverted. It no longer protects us from our rulers. Rather, it simply deepens their power over us.

New Labour really believes that it knows what is good for us. But when such belief comes with unlimited power, it is hugely dangerous. The government has voted itself sweeping powers, in the genuine belief that it will use them wisely. But it has led to people being arrested for heckling the Foreign Secretary, staging a one-man protest in Whitehall, and indeed dropping an apple core. Soon the police will have powers to arrest anyone taking a picture of them.

I had great difficulty getting the major publishers to take my book, because nobody seemed to realise how far we had slid into a police state. But now, with former MI5 chief Stella Rimington and David Blunkett both saying exactly that, I feel vindicated. Just stand back, and you will see how far it is gone.

Will a Conservative administration rein back its own powers and set us free once again? I can’t say I’m confident. Power is intoxicating. Politicians almost never give it up. But it will take a radical shift of power, from the politicians at the centre to the people in the localities, to pull us out of this rotten state.