Arguing whether or not Krugman is right or wrong about an issue is one thing, but it's another to say that he doesn't know what he's talking about. He's a Nobel laureate!
Is he really that bad? Or do you just disagree with him?
He's a Nobel laureate _who denies the Broken Window Fallacy_ (and who, to reiterate the original poster's point, thinks that living within a budget is a bad idea). If his ideas are that bad and he collects those kinds of honors anyways, something's wrong with the Nobel Economics committee.