From an article I saw somewhere, and now I can't seem to locate it:
That professionalism is evident in the GAO analysis of the net present value of the Social Security and Medicare promises Washington has made to Americans. “Net present value” means the total that would have to be set aside today to pay the costs of these programs in the future. The government puts these numbers in appendices, rather than in headlines. But the costs are real.
In fiscal 2011, the cost of the promises grew from $30.9 trillion to $33.8 trillion. To put that in context, consider that the total value of companies traded on U.S. stock markets is $13.1 trillion, based on the Wilshire 5000 index, and the value of the equity in U.S. taxpayers’ homes, according to Freddie Mac, is $6.2 trillion. Said another way, there is not enough wealth in America to meet those promises.
I think that does it.