First Form Answer:

because the rich will weasel out of it — Thousands Of Economists

The rich don’t pay taxes because they have found ways of avoiding them. This means, any future tax will be avoided as well. Only the poor pay taxes as levied, since they aren’t smart enough to figure a way out of them. Neither are they rich enough, to pay a smart person money, to do the scheming for them.

Corollary: only the slow are caught. — Thousands Of Economists

Corollary: we live off the weak. — Thousands Of Economists

Wail Street Journal

Those who wail loudly about deficits, wail louder about taxes.