Paul Krugman has a column in today's New York Times faulting Republicans for a lack of "consistency" in criticizing plans by Democrats to cut Medicare. He says it is "bizarre," given that "In the 1990s, Newt Gingrich tried to force drastic cuts in Medicare financing." It is bizarre and inconsistent -- but no more bizarre and inconsistent than the fact that the same Democrats who were protesting the Gingrich "cuts" -- really just reductions in the expected growth rates -- are now the ones calling for cuts themselves. Mr. Krugman is correct to point out the Republicans aren't exactly principled on this issue. But it isn't just the Republicans whose positions vary based on the political situation -- Democrats play the same game, though Mr. Krugman does not call them on it.