What Ezra is doing here is a minor version of the all too common sin of presenting what is, in political terms, a moderately left of center position and treating it as the obviously correct policy. There’s a reason for that: objectively, it is in fact the obviously correct policy. But you won’t get anyone on the right admitting that.Krugman, of course, focuses on the fact that (contra Klein) "most every economist" doesn't actually support any policy consensus on the US deficit or Europe's debt problems. I'd add that whatever economists think, politicians really don't all agree, either. It's harder to know what pols "really" think, but I'd be shocked if Michele Bachmann, for example, really believes that increasing government deficits now and reducing them in the long term is good policy. Yes, Bachmann is an extreme example...but I don't really see any reason to believe that most GOP Members of Congress secretly support Klein's consensus. I mean, it's not exactly the most economically literate bunch, and if you think about partisan information flows -- I don't really see any reason not to think that most Republicans in Congress are sincerely pro-austerity. Then there are those columnists and newspaper editorial types who support austerity, not to mention ordinary citizens who poll pro-austerity (although to be sure they'll also support pro-growth policies).
In some ways, the story that everyone agrees on policy but good policy is thwarted by poor institutional arrangements and incentives is a optimistic one. But it really isn't true, and a very Nice catch! to Krugman for pointing that out.