well, you can't defend against it because you are supporting a secretive, slimy hedge fund manager who won't release his tax records. It is like hey, i am a kick-ass businessman, but offer no proof and by the way, i won't offer any proof, just trust me. You support him as a businessman yet you have no evidence of his performance other than press releases from Bain from employees under gag orders.
so you think he didn't go to extreme measures to avoid taxes?