As long ago as 1984, in his Paths to Paradise, André Gorz, a self-proclaimed “revolutionary-reformist” stated, baldly, that the “micro-economic revolution heralds the abolition of work”. He even argued that “waged work . . . may cease to be a central preoccupation by the end of the century”. His timing was wrong. But serious analysts think he was directionally right. So what might a world of intelligent machines mean for humanity? Will human beings become as economically irrelevant as horses? If so, what will happen to our individual self-worth and the organisation of our societies?

In a remarkable recent lecture, Adair Turner, former chairman of the UK’s financial regulator and chairman of the Institute for New Economic Thinking, addresses just these questions. He started from the assumption that intelligent machines will ultimately be able to perform most forms of current work better than people and at lower cost. This, he argues, is a question of when, not if. It will happen because of the progressive advance of processing power, the costless replicability of software and the rise of machine learning. Robot gods will make us all redundant.

Drawing on A Future that Works, a report published by the McKinsey Global Institute last year, Lord Turner adds that this future will not come evenly: some will be more affected far sooner than others. Moreover, even if intelligent machines cannot do every aspect of any given job, they can displace a great many workers.

With current technology, predictable physical tasks and collecting and processing of data will be especially vulnerable. By sector, “accommodation and food services”, manufacturing and transportation will be particularly vulnerable. According to a paper by Jason Furman, former chairman of the US Council of Economic Advisers, and Robert Seamans of the Stern School of Business, those who earn less and those with less education are more vulnerable.

Lord Turner argues that what is happening also explains the “productivity paradox” — rapid innovation, but low productivity growth — that I discussed two weeks ago. A big part of the explanation may be a shift from relatively high-paid jobs in sectors with relatively fast productivity growth, such as manufacturing, towards relatively low-paid jobs in sectors with low productivity growth, such as personal care, home health aides and retail sales. Of the 10 US sectors with the biggest forecast growth in employment between 2014 and 2024, which are expected to generate 29 per cent of all new jobs, eight have median wages below the national median. This, of course, would worsen inequality, and would have strongly negative implications for overall productivity. (See charts.)

That is not all. Lord Turner also suggests other reasons for rising inequality and low average productivity growth. The first is the growth of “zero (or near zero)-sum” activities, some of which are not measured in economic output and few of which contribute to social wellbeing: think lobbyists, flash-traders or tax lawyers. Even education has a strongly zero-sum character: it is a positional good. Moreover, such zero-sum activities are well paid and so extract a great deal of rent. Successful creators of digital near monopolies also enjoy a great deal of rent. So, not least, do owners of property in prosperous conurbations. The new economy then is the rentier’s paradise.

The second is the under-recording of the value of free services. This is possible. But free services — social media, for example — may, he notes, contribute little to welfare. Right now, the contributions may be much personal misery and the destruction of our democracies.

This then is the picture for the medium-term future: sluggish overall productivity growth and worsening inequality. This is inconsistent with stable democracy. More likely is an aggravation of today’s politics of greed and grievance. The outcome could be plutocracy, populist autocracy, or a blend. If automation ultimately rendered humanity economically irrelevant, the challenges would be even more radical.

In the medium term, so long as there is a reasonable prospect of jobs for people who want to work, the crucial policy will be subsidising jobs. It is also vital to fund high-quality public services for all, notably, health, education and transportation. Moreover, as Dean Baker argues, the concentration of incomes from scarcity rents cries out for higher taxation of wealth and top incomes, notably including land and intellectual property. Indeed, intellectual property is almost certainly too highly protected now. There is a case for some protection, but not too much of it. I believe Adam Smith would agree.

In the longer term, our descendants may face even more existential decisions (provided the machines allow them to make them). How might they organise society in a world in which few people can do anything that is obviously economically productive? The world might become techno-feudal, with an owning elite hiring great numbers of cheap human servants not for their value, but for the pleasure of domination. People might instead share the abundance more equally, with all enjoying the civilised leisure that was once the province of the very few. Ours is the first civilisation to view work as the highest calling. Maybe that strange prejudice will need to be discarded.

That is for the distant future, however, though one we must think about now. But the trends under way demand action. If the natural tendency of our economies is towards ever-rising rent extraction and inequality, with all its dire social and political results, we need to respond in a thoughtful and determined way. That is the great challenge.

martin.wolf@ft.com

Letters in response to this column:

AI and the rise of a software-based economy / From Dr Robert B Cohen

Someone must be accountable when AI fails / From Walter P Blass, Warren, NJ, US

Well-paid professionals are more at risk from AI / From Ronald Randall, Edgewater, NJ, US

Creative jobs will always need the human brain / From Sir Peter Bazalgette, London, UK

Consumer demand is a better predictor of changes in employment / From Joaquin Goquiolay

It was not Roman genius that gave us the medieval machines / From Ted Gaffney