RT reported last Tuesday that a report by James Hamilton out of the University of California San Diego has estimated that the Federal Government has accumulated $70 Trillion in unofficial debt. The World Bank calculations for Global GDP for 2012 is $71 Trillion. In short unofficial US debt is virtually equal to Global GDP. It might be feasible for the US the clear its unofficial debt by subsuming the entire planet, but considering that the official debt is $12 Trillion and rapidly rising that option would solve the US's fiscal problems. To pay its debt off the US will need send explorers like Cpts. Kirk and Picard into the nether reaches of the Galaxy to rape and pillage as of yet unknown planets or devalue the dollar to such an extent that the ratio isn't ludicrous. The RT article can be found here.