The Tea Party hardliners do try leverage contradictory arguments. They want to use the threat of a debt debacle to "leverage" policy changes, yet they turn around saying default won't happen anyway, that the debt ceiling is no big deal. The difference between new appropriation and paying bills already owed gets glossed over with intentional intellectual sloppiness.
There was a platitude common during the dire talk about the 1975 New York City financial crisis. It was "They would never let that happen/" But, there is no "they". It's we.
Update: Later today.
CNN is reporting major progress in the Senate. Possibly a debt deal until Feb. 15 (sounds like a good day for a layoff(). There would be a deadline of Dec. 13 for a budget deal.
Gay Patriot (a site with libertarian views on everything, generally) has its own analysis of why default would not happen, here. Some other posts there are worth a look, too.