Most say their vote has a price...
http://media.www.nyunews.com/media/storage/paper869/news/2007/11/14/News/Most-Say.Their.Vote.Has.A.Price-3099547.shtml
I think the last line hits it right on the head...
One CAS junior went even further, writing that "anyone who'd sell his lifelong right to vote should be deported."