Obviously it's not desirable for the US to keep piling on debt until the end of time, but the middle of the worst economic crisis since the Depression isn't the time to start cutting government spending.
The problem with the austerity approach is that it's never been an attempt to solve the crisis, but an attempt to use it as an excuse to slash government.
I find it hilarious how some people would like the paint the picture of this debate being between people who favor racking up debt and people who are against deficits. It's almost comical how dumb that argument is.