Pay off the debt?
Hell I'm starting to believe we will never have a balanced budget again, so tell me when we actually stop adding to the debt?
Now if you include unfunded mandates as part of the 'debt' then I scoff at anyone who thinks the world economy can generate enough future wealth to somehow pay it off, it's absurd on it's face.
Hyperinflation or debt repudiation are the only two outcomes, in fact there will most certainly be both.
It's just a matter of time.