Well... You shouldn't borrow of course... But now you have...
So the question really isn't just how to pay off on that debt, but how to slash 10-15% of the US GDP in one go, and not have the place descend into chaos I guess?
The US for decades was consuming today the projected GDP growth in the coming 5-10 years, and making up for the shortfall by borrowing.
Now you're in the same nasty place of a number of the indebted EU nations, where it has proven that cutting 1% government spending equates to a reduction of the national GDP by -1,5-1,7%.
So how large a reduction of the US GDP do you think the place can handle at this point? The cure might be worse than the ailment after all. You may be paying throigh your nose on those loans, but that is likely to pale compared to what you may end up paying in you slam the US national economy in reverse gear...