These are just the very immediate, very theatrical outcomes. Obviously, over any longer term, you'd have issues from bankrupt vendors stopping work funded with federal highway money, forgone maintenance on things like levees and government buildings, and so forth. Averting any of these things would require at least small cuts in Social Security, Medicare/Medicaid spending, or military payrolls.
Now, maybe you look forward to these outcomes. There are certainly some on this list that I would be okay with. But because I am not delusional, and I did not fall off of a turnip truck last night, I recognize that the American public does not agree with me, and that if any of these things happen, they will freak out and besiege their local representatives. And as we can see from the examples in the New York Times article, when faced with demanding constituents, the new face of the GOP is not quite as steely-minded on the subject of spending as we have been told.
Nor, realistically, can they be: as I've said before, if they did hold out, the only thing that would happen is that they would be unelected in 2012. The tea party is not a majority. If you piss off every single other constituency in the United States, they will gang up against you, and they will win. Welcome to representative democracy.