US Govt debt is destroying the place, but to a very large degree is caused by health care program's and the like. The growth in medical expenses and govt departments has been nothing short of spectacular and is exponential. It is one of the very first times in history that a world superpower is destroying itself through populace largesse rather than military weakness/failure.
And of course it's not that simple, but I think that's the problem the US is grappling with. Voters want more cash for their vote....