I'll just add, as I've noted before, that many critics of the Fair Tax proposal act as if Huckabee invented it. Actually, it's been the subject of discussion for a while, and there's a bestselling book involved. This doesn't make the plan a good idea -- there are plenty of bestselling books that outline bad ideas -- but it seems as if discussions should reflect the plan's origins.
UPDATE: Related thoughts from Arnold Kling, who favors a "semi-fair tax."
