That this agenda was rooted as much in the GOP's desire to worsen the economy as their back door to the White House and control of Congress more than any faith in "markets" seems likely given what the actual markets for US debt were telling us as the debate unfolded. Ezra Klein at Wonkbook:
In Washington, 2011 was all about dangers posed by America’s deficits. Republicans said deficit reduction was priority number one. Democrats mostly went along. But in the markets, the story was precisely the opposite. As Daniel Kruger reports in Bloomberg, demand for American debt was stronger in 2011 than in any year since 1995. It's cheaper for the U.S. to finance its debt today than it was when we last had surpluses...