This should be fairly easily answered by you guys. When people pay into the SS fund, the money is loaned to the government. Government then pays back the debt to the fund with interest, and the SS fund loans it again back to government. Is the re-invested part called "intergovernmental debt" while the whole sum that government owes to the SS fund is called "Unfunded liablities of SS" (amounting around 20T)? If this is correct, why aren't unfounded liabilities included when calculating the US government's debt? Is there data somewhere that tells us how many bonds in dollars are in the SS fund? People often say that the SS fund is solvent till 2035. So is the SS fund promising a too high wield? Of course this is kind of irrelevant information, as the fund's solvency is actually dependent on government. I wonder why the number is made to be the big deal. Thanks.