Dick Cheney may think deficits don't matter, but the GAO chief doesn't agree:

If the United States government conducts business as usual over the next few decades, a national debt that is already $8.5 trillion could reach $46 trillion or more, adjusted for inflation. That's almost as much as the total net worth of every person in America -- Bill Gates,
Warren Buffett and those Google guys included.

A hole that big could paralyze the U.S. economy; according to some projections, just the interest payments on a debt that big would be as much as all the taxes the government collects today.

And every year that nothing is done about it, Walker says, the problem grows by $2 trillion to $3 trillion.