the bit asherman posted about taxes was worked into the ground on abuzz a couple of years ago. a couple of economists made absolute hash of it. amusing when you read it, but when you start analyzing it (not my strong suit, i do stats not economics), it doesn't hold up.
billw - i threw it into google as well - got over 21000 hits!
this was an interesting analysis of it (a little more belligerent than what i was looking for, but it'll do)
http://www.politicalstrategy.org/2003_01_14_weblog_archive.htm
hmmmm, it's a weblog - in case the link funks out, i'll post the end of it separately