If you’ve written a successful book based around one big idea, what do you make the next one about? Back in 2009, Kate Pickett’s The Spirit Level (co-authored with Richard Wilkinson) argued that inequality was the ultimate cause of almost all our social problems, from obesity and teenage pregnancy to violent crime; more equal societies, they claimed, had better outcomes across the board. While criticised – as most “big idea” books are – for overstating the case and cherrypicking evidence, they struck a chord, and some aspects of their thesis are now mainstream.
However, when it comes to the UK, there is an awkward problem, both for Pickett and for economists like me who, while not entirely convinced by The Spirit Level, would still like to see a more equal society. In the first chapter of Pickett’s new book, inequality is once again the root of all (social) evils: “if you know a country’s level of inequality, you can do a pretty good job of predicting its infant mortality rate, or prevalence of mental illness, or levels of homicide or imprisonment”. By contrast, she argues that GDP or GDP growth are very poor measures of overall welfare. Pickett then goes on to list the ways in which the UK has become a worse place to live since 2010 – higher child poverty, flattening life expectancy and child mortality, more people in prison.
