What’s the greatest threat to our still-fragile economic recovery? Dangers abound, of course. But what I currently find most ominous is the spread of a destructive idea: the view that now, less than a year into a weak recovery from the worst slump since World War II, is the time for policy makers to stop helping the jobless and start inflicting pain.

When the financial crisis first struck, most of the world’s policy makers responded appropriately, cutting interest rates and allowing deficits to rise. And by doing the right thing, by applying the lessons learned from the 1930s, they managed to limit the damage: It was terrible, but it wasn’t a second Great Depression.

Now, however, demands that governments switch from supporting their economies to punishing them have been proliferating in op-eds, speeches and reports from international organizations. Indeed, the idea that what depressed economies really need is even more suffering seems to be the new conventional wisdom, which John Kenneth Galbraith famously defined as “the ideas which are esteemed at any time for their acceptability.”

The extent to which inflicting economic pain has become the accepted thing was driven home to me by the latest report on the economic outlook from the Organization for Economic Cooperation and Development, an influential Paris-based think tank supported by the governments of the world’s advanced economies. The O.E.C.D. is a deeply cautious organization; what it says at any given time virtually defines that moment’s conventional wisdom. And what the O.E.C.D. is saying right now is that policy makers should stop promoting economic recovery and instead begin raising interest rates and slashing spending.