Corporate money given to politicians is like cocaine. After tasting it for a while they can't say no. The pusher keeps asking for then demanding a higher price for his goods. After a while, the addict will completely abandon his/her principles and mores to keep the junk coming. And it is just soooo easy. All they have to do is cast their vote and turn their face away from the consequences and have another round of golf.
Cross posted at my Vulnerable Geometry blog.