You want to use something with a probability of zero as leverage? That's pretty terrible leverage. There are things we can do to stave off default in the short term, Treasury says we can make it till about July.
If you are arguing for 'fiscal sanity' you are doing the exact opposite of it. What's funny is that if you want to use the threat of default and a global economic meltdown as leverage, you have to be willing to do it to make a credible threat. Even a credible threat will likely have dire effects on global financial markets at it undermines the credibility of US securities.
Argue for lower spending all you want, but this is the absolute most insanely stupid way to go about it. Once again, incredibly irresponsible. Those who want to do it are not fit to govern, because they are incompetent.
Its like when the taxes were going to increase, the republicans used it as leverage to keep the taxes the same on all income levels, Obama would of course sign it, not willing to make himself look bad by risking that taxes increase on all americans.
Its the same thing here, attach something tangible to the debt ceiling increase, he'll have to sign it, he won't want to risk anything.
The republicans will do this, just watch.