Krugman is not the only economist on the rampage. Speaking to the anti-stimulus crowd in Washington, both in Congress and without, Mark Thoma says:

You are still arguing, unashamedly, that you know a recovery is just around the corner and any attempts to help people will come too late to do any good. It’s the same argument you’ve been making for more than a year now and it was wrong then, and it’s likely to be just as wrong now. The end is not just around the corner, especially for employment which lags behind output, yet here you are dishing out more of the same.
So when you hear about someone who worked hard all their lives to provide for their family, someone who always did the right thing but is now unemployed and unable to meet the household’s needs due to unemployment, someone who might have benefitted from an earlier and more aggressive stimulus package, pat yourself on the back and say “I helped to make that happen.”

Whew!