Because heedless of causing another worldwide recession, they evidently plan on shutting down the federal government by refusing to pay for appropriations they have already passed. Golly, they voted for 2 wars they did not fund, tax breaks for the rich which depleted the surpluses of the Clinton budgets and which only just expired, and an unfunded prescription drug benefit.
Now having spent like drunken sailors for all of the Cheney presidency, they want their pattern of excess taken out of the hides of seniors, veterans, and disabled people.
They ran up the bills and now want to evade the tab.
[House Republicans are seriously entertaining dramatic steps, including default or shutting down the government, to force President Barack Obama to finally cut spending by the end of March.
The idea of allowing the country to default by refusing to increase the debt limit is getting more widespread and serious traction among House Republicans than people realize, though GOP leaders think shutting down the government is the much more likely outcome of the spending fights this winter.]
Read more: http://www.politico.com/story/2013/01/behind-the-curtain-house-gop-eyes-default-shutdown-86116.html#ixzz2HyDFOydY
Ironically having lost in national elections, te Republican'ts now wish to use the Constitutional system to prevent the government from functioning rather than work together to make the damn thing work, to put their narrow, ideological position ahead of what will work.
[But don't imagine that this is all over: two months from now, we start all over again, when Republicans will almost certainly try to hold the debt ceiling hostage, again, in order to wring the spending concessions out of President Obama that they couldn't get in this go-around.
To put it simply, this is no way to run a functioning democracy. But when you have one political party that has basically surrendered the responsibility of governing the United States, this is the result.] emphasis added for scorn