If John McCain is such a maverick..why did he vote for the bail out?

if he was a true maverick he would of voted against the bail out since it had many earmarks/pork and we all know what he would do if he was president and those kinds of bills landed on his desk..yes that's right folks he would veto them because he doesn't believe in bills that contain earmarks. So how can he say he's this big maverick who wants to shake up washington when he does an about face and votes for the one thing he has always said he would veto when president