debt

the US public debt amount to USD 10,663,306,735,490.99 today and still growing every minute. that's more than 10 and a half trillion. the sustainability of this debt is highly questionable. credit is a promise to pay with future earnings. the rate of increase of debt is much faster than the rate of increase in real income. so how could one manage to pay off a rising debt which is faster than real income? the us economy is a time bomb which is set to go off, perhaps not within the next 5 years at least, when the funding of the debt stop. just like the recent liquidity crisis, but at a much larger scale.
so which will be the new power house? china or india or gulf countries or who? china and india has problems of their own and it's difficult to picture them as the power house. gulf countries aren't any better than c&i. so what will the world come to in 10 or 20 years time?