The government can't, and I mean CAN't, let any of the big three fail. If just one goes under, a recent study (3 days ago) estimates a total job loss of 2.5 million jobs in the first year alone after they go down. Thats more than twice what we have lost this year with all of the economic woes. Based just on that D.C. won't let them go.
Edit: Link to the job loss story :
http://voices.washingtonpost.com/eco...ith_autom.html