AIG Hearing: CEO Impressive

Can Congress legally vote in the special tax to claw back these bonuses? Or rather, would such a law hold-up in court?

Seems like a Bill of Attainder which is prohibited by the Constitution:

Article I, Section 9, paragraph 3 says that: “No Bill of Attainder or ex post facto Law will be passed.”

Since IANAL on looking it up I found this:

So, while I despise the thought of these creeps getting paid substantial sums to deal with the mess they made that kind of reads to me like Congress is intent on targeting a specific group and undoing the obligation of a contract after-the-fact.