Reading Wilkinson it becomes clear that he is a classic rationalist. He derives his libertarianism a priori — a set of propositions on a chalkboard. Contrast with, for example, the average tea partier, who gets his as a uniquely American historical inheritance — a full-blooded tradition.
OK, aside from the violation of Lambchop's Law there (suggesting that hating the welfare state is a uniquely American historical inheritance is surely as illegitimate without at least a bookful of evidence as stating that "the American people hate the welfare state"), doesn't this make the average tea partier a conservative, not a libertarian?
ETA: I didn't realize how old Stephanie's post was!