OPINION: Santa Claus does not exist. Just about everyone older than 12 understands that. Yet both Republican and Democratic politicians argue, almost daily, that Santa Claus is real, except his actual name is Uncle Sam. The Democratic version of this story is that, notwithstanding the federal government’s dire fiscal situation, the government can hand out even more benefits and create more spending programs if only we would increase taxes on the rich and corporations so that they pay their “