Indeed, I'll happily bet that any libertarian with a Ph.D. from a top-10 social science program can fool more voters than Krugman. We learn his worldview as part of the curriculum. He learns ours in his spare time - if he chooses to spare it.

If we take this as a test, It should be noted that it seems to be biased against popular/conventional/establishment/dominant schools of thought. Historically speaking religious minorities often know a lot about the dominant religion, though the slant may be biased.

However depending on which other tests we use in our investigation this might be a feature not a bug.