You seriously don't find anything absurd about multi-millionaire, major studio movie stars preaching left-wing economics? Without capitalism, Brad Pitt wouldn't be famous or rich. Or y'know, be able to star in that TV advert that's always on. There's no way he'd give it up.
I do think he's a great actor though, so I don't let this stuff really bother me unless I'm debating with liberals on political topics.