Krugman on The Austerity Delusion.

But couldn’t America still end up like Greece? Yes, of course. If investors decide that we’re a banana republic whose politicians can’t or won’t come to grips with long-term problems, they will indeed stop buying our debt. But that’s not a prospect that hinges, one way or another, on whether we punish ourselves with short-run spending cuts.

Just ask the Irish, whose government — having taken on an unsustainable debt burden by trying to bail out runaway banks — tried to reassure markets by imposing savage austerity measures on ordinary citizens. The same people urging spending cuts on America cheered. “Ireland offers an admirable lesson in fiscal responsibility,” declared Alan Reynolds of the Cato Institute, who said that the spending cuts had removed fears over Irish solvency and predicted rapid economic recovery.

That was in June 2009. Since then, the interest rate on Irish debt has doubled; Ireland’s unemployment rate now stands at 13.5 percent.

And then there’s the British experience. Like America, Britain is still perceived as solvent by financial markets, giving it room to pursue a strategy of jobs first, deficits later. But the government of Prime Minister David Cameron chose instead to move to immediate, unforced austerity, in the belief that private spending would more than make up for the government’s pullback. As I like to put it, the Cameron plan was based on belief that the confidence fairy would make everything all right.

But she hasn’t: British growth has stalled, and the government has marked up its deficit projections as a result.