Look, I get the argument Krugman is making:
It is, in short, a classic example of the kind of situation in which policy coordination is essential — but you won’t get coordination if policymakers in the biggest European economy refuse to go along.
But Steinbrueck also makes a lot of sense too:
The speed at which proposals are put together under pressure that don't even pass an economic test is breathtaking and depressing. Our British friends are now cutting their value-added tax. We have no idea how much of that stores will pass on to customers. Are you really going to buy a DVD player because it now costs £39.10 instead of £39.90? All this will do is raise Britain's debt to a level that will take a whole generation to work off. The same people who would never touch deficit spending are now tossing around billions. The switch from decades of supply-side politics all the way to a crass Keynesianism is breathtaking. When I ask about the origins of the crisis, economists I respect tell me it is the credit-financed growth of recent years and decades. Isn't this the same mistake everyone is suddenly making again, under all the public pressure?
He has a point too. It's a classic case of private virtue (albeit writ large) not translating into a public good. Complicated, no?