If I were O'Bama, and Congress failed to raise the debt ceiling, I'd just keep paying the country's debts anyway on the basis of the 14th amendment. They could try to impeach me for all I'd care. Then again, I'm not like O'Bama.
I don't assume that my opponents have the interests of the country at heart, and I don't think that the problems of government can be fixed simply by manning it with good people. Every 4 years, the electorate is apt to put a complete douchenozzle in the White House, and then the structural deficiencies of the system become glaringly manifest. We need to restructure the system so that evil and incompetent administrations simply can't do that much harm. Also, I don't generally like to start negotiating from the point where I think me and my opponents should probably end up. I like to let my opponents negotiate for what they want after I put what I want on the table. That way, if my opponents are not negotiating in good faith, I won't have bargained against myself.