I think we'll owe about 250 billion by 2014.
Paying that off over 20 years would require capital re-payments of approx 12 billion per year. Interest in the first few years, if at only 2%, would be another 5 billion.
So 17 billion to pay each year, on interest and capital.
We currently take in 50 billion I think, and spend 70 billion. I cannot see us getting our spending down to 33 billion, from 70 billion, .. so that we can spend our 50 billion per year on 33 spending and 17 interest and capital.
Are these back of the envelope calculations significantly wrong? If not I think we're deluding ourselves if we think we can pay it all back.