They are bailing because they've figured out that they are the people Obama is counting on to finance this thing. (They thought it was a great program when they were still under the impression it was being paid for with other people's money.)
Still leaves the question open - have they determined that it can’t work with “other people’s money” because there’s not enough of it,
or do they just think that Obama screwed up the implementation,
or worse, that Obama could have gotten it right if given enough power to implement it the “right way”.
That last one is usually the one they fall to,
and that’s super-scary.