Business as usual. That will be the implicit message when the Sveriges Riksbank announces this year’s winner of the “Prize in Economic Sciences in Memory of Alfred Nobel”, to give it its full title. Seven years ago this autumn, practically the entire mainstream economics profession was caught off guard by the global financial crash and the “worst panic since the 1930s” that followed. And yet on Monday the glorification of economics as a scientific field on a par with physics, chemistry and medicine will continue.

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The problem is not so much that there is a Nobel prize in economics, but that there are no equivalent prizes in psychology, sociology, anthropology. Economics, this seems to say, is not a social science but an exact one, like physics or chemistry – a distinction that not only encourages hubris among economists but also changes the way we think about the economy.

A Nobel prize in economics implies that the human world operates much like the physical world: that it can be described and understood in neutral terms, and that it lends itself to modelling, like chemical reactions or the movement of the stars. It creates the impression that economists are not in the business of constructing inherently imperfect theories, but of discovering timeless truths.

To illustrate just how dangerous that kind of belief can be, one only need to consider the fate of Long-Term Capital Management, a hedge fund set up by, among others, the economists Myron Scholes and Robert Merton in 1994. With their work on derivatives, Scholes and Merton seemed to have hit on a formula that yielded a safe but lucrative trading strategy. In 1997 they were awarded the Nobel prize. A year later, Long-Term Capital Management lost $4.6bn (£3bn)in less than four months; a bailout was required to avert the threat to the global financial system. Markets, it seemed, didn’t always behave like scientific models.

In the decade that followed, the same over-confidence in the power and wisdom of financial models bred a disastrous culture of complacency, ending in the 2008 crash. Why should bankers ask themselves if a lucrative new complex financial product is safe when the models tell them it is? Why give regulators real power when models can do their work for them?

Many economists seem to have come to think of their field in scientific terms: a body of incrementally growing objective knowledge. Over the past decades mainstream economics in universities has become increasingly mathematical, focusing on complex statistical analyses and modelling to the detriment of the observation of reality.

Consider this throwaway line from the former top regulator and London School of Economics director Howard Davies in his 2010 book The Financial Crisis: Who Is to Blame?: “There is a lack of real-life research on trading floors themselves.” To which one might say: well, yes, so how about doing something about that? After all, Davies was at the time heading what is probably the most prestigious institution for economics research in Europe, located a stone’s throw away from the banks that blew up.

Facebook Twitter Pinterest Howard Davies, pictured in 2006. Photograph: Eamonn McCabe/The Guardian

All those banks have “structured products approval committees”, where a team of banking staff sits down to decide whether their bank should adopt a particular new complex financial product. If economics were a social science like sociology or anthropology, practitioners would set about interviewing those committee members, scrutinising the meetings’ minutes and trying to observe as many meetings as possible. That is how the kind of fieldwork-based, “qualitative” social sciences, which economists like to discard as “soft” and unscientific, operate. It is true that this approach, too, comes with serious methodological caveats, such as verifiability, selection bias or observer bias. The difference is that other social sciences are open about these limitations, arguing that, while human knowledge about humans is fundamentally different from human knowledge about the natural world, those imperfect observations are extremely important to make.

Compare that humility to that of former central banker Alan Greenspan, one of the architects of the deregulation of finance, and a great believer in models. After the crash hit, Greenspan appeared before a congressional committee in the US to explain himself. “I made a mistake in presuming that the self-interests of organisations, specifically banks and others, were such that they were best capable of protecting their own shareholders and their equity in the firms,” said the man whom fellow economists used to celebrate as “the maestro”.

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In other words, Greenspan had been unable to imagine that bankers would run their own bank into the ground. Had the maestro read the tiny pile of books by financial anthropologists he may have found it easier to imagine such behaviour. Then he would have known that over past decades banks had adopted a “zero job security” hire-and-fire culture, breeding a “zero-loyalty” mentality that can be summarised as: “If you can be out of the door in five minutes, your horizon becomes five minutes.”

While this was apparently new to Greenspan it was not to anthropologist Karen Ho, who did years of fieldwork at a Wall Street bank. Her book Liquidated emphasises the pivotal role of zero job security at Wall Street (the same system governs the City of London). The financial sociologist Vincent Lépinay’s Codes of Finance, a book about the division in a French bank for complex financial products, describes in convincing detail how institutional memory suffers when people switch jobs frequently and at short notice.

Perhaps the most pernicious effect of the status of economics in public life has been the hegemony of technocratic thinking. Political questions about how to run society have come to be framed as technical issues, fatally diminishing politics as the arena where society debates means and ends. Take a crucial concept such as gross domestic product. As Ha-Joon Chang makes clear in 23 Things They Don’t Tell You About Capitalism, the choices about what not to include in GDP (household work, to name one) are highly ideological. The same applies to inflation, since there is nothing neutral about the decision not to give greater weight to the explosion in housing and stock market prices when calculating inflation.

Facebook Twitter Pinterest Ha-Joon Chang, pictured at the Hay-on-Wye festival, Wales. Photograph: David Levenson/Getty Images

GDP, inflation and even growth figures are not objective temperature measurements of the economy, no matter how many economists, commentators and politicians like to pretend they are. Much of economics is politics disguised as technocracy – acknowledging this might help open up the space for political debate and change that has been so lacking in the past seven years.

Would it not be extremely useful to take economics down one peg by overhauling the prize to include all social sciences? The Nobel prize for economics is not even a “real” Nobel prize anyway, having only been set up by the Swedish central bank in 1969. In recent years, it may have been awarded to more non-conventional practitioners such as the psychologist Daniel Kahneman. However, Kahneman was still rewarded for his contribution to the science of economics, still putting that field centre stage.

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Think of how frequently the Nobel prize for literature elevates little-known writers or poets to the global stage, or how the peace prize stirs up a vital global conversation: Naguib Mahfouz’s Nobel introduced Arab literature to a mass audience, while last year’s prize for Kailash Satyarthi and Malala Yousafzai put the right of all children to an education on the agenda. Nobel prizes in economics, meanwhile, go to “contributions to methods of analysing economic time series with time-varying volatility” (2003) or the “analysis of trade patterns and location of economic activity” (2008).

A revamped social science Nobel prize could play a similar role, feeding the global conversation with new discoveries and insights from across the social sciences, while always emphasising the need for humility in treating knowledge by humans about humans. One good candidate would be the sociologist Zygmunt Bauman, whose writing on the “liquid modernity” of post-utopian capitalism deserves the largest audience possible. Richard Sennett and his work on the “corrosion of character” among workers in today’s economies would be another. Will economists volunteer to share their prestigious prize out of their own acccord? Their own mainstream economic assumptions about human selfishness suggest they will not.