In the spring of 2010, fiscal austerity became fashionable. I use the term advisedly: the sudden consensus among Very Serious People that everyone must balance budgets now now now wasn’t based on any kind of careful analysis. It was more like a fad, something everyone professed to believe because that was what the in-crowd was saying.

And it’s a fad that has been fading lately, as evidence has accumulated that the lessons of the past remain relevant, that trying to balance budgets in the face of high unemployment and falling inflation is still a really bad idea. Most notably, the confidence fairy has been exposed as a myth. There have been widespread claims that deficit-cutting actually reduces unemployment because it reassures consumers and businesses; but multiple studies of historical record, including one by the International Monetary Fund, have shown that this claim has no basis in reality.

No widespread fad ever passes, however, without leaving some fashion victims in its wake. In this case, the victims are the people of Britain, who have the misfortune to be ruled by a government that took office at the height of the austerity fad and won’t admit that it was wrong.

Britain, like America, is suffering from the aftermath of a housing and debt bubble. Its problems are compounded by London’s role as an international financial center: Britain came to rely too much on profits from wheeling and dealing to drive its economy  and on financial-industry tax payments to pay for government programs.