There are three reasons -- take your pick.
First on their agenda is a dead economy with high unemployment. They believe this will bring Obama down and are willing to destroy the country to achieve that, and hopefully regain power.
They're only interested in helping the rich and are in lock-step for lowering taxes on their biggest donors at the expense of 99 percent of the population.
Or, they're too stupid to see what their destructive ideology of low taxes and austerity does to the economy and the country.
I would like to think it's the first two but we can't rule out the third.
Originally Posted by BigLouie
It's a combination of all three, if you look at Congressional Republicans as a monolith, but as a whole, it's reason two, one, and three, in that order. But mostly two.