Let’s assume that monolithic bloc of house republicans isn’t totally sinister. A stretch maybe but roll with me. So they know this stimulus bill will pass with or without their vote. So they demand concessions, get them, then vote against it anyways.
So either the stimulus bill works or doesn’t work. If it works, great, and Republicans get shafted. But if it fails – and it could – then in 2010 they get to say I told you so all day long. In other words, they aren’t evil and blind and stupid just cold and calculating. Which maybe is just as bad but at least understandable.