The U.S. Securities and Exchange Commission (SEC) was set up to combat fraudulent practices. The SEC's website explains that "Ponzi schemes are a type of illegal pyramid scheme named for Charles Ponzi, who duped thousands of New England residents into investing in a postage stamp speculation scheme back in the 1920s." It goes on to say, "Decades later, the Ponzi scheme continues to work on the 'rob-Peter-to-pay-Paul' principle, as money from new investors is used to pay off earlier investors until the whole scheme collapses." That is how the SEC described the recent Bernard Madoff $50 billion Ponzi scheme, "a stunning fraud that appears to be of epic proportions."
A Ponzi scheme does not generate any wealth whatsoever; that is why it ultimately collapses. As Circuit Judge Anderson said in the 1922 Lowell v. Brown case, the Ponzi scheme was "simply the old fraud of paying the earlier comers out of the contributions of the later comers." So long as the number of late comers -- you might call them suckers -- grows, the fraudulent scheme has life.
We have a national Ponzi scheme where Congress collects about $785 billion in Social Security taxes from about 163 million workers to send out $585 billion to 50 million Social Security recipients. Social Security's trustees tell us that the surplus goes into a $2.2 trillion trust fund to meet future obligations. The problem is whatever difference between Social Security taxes and benefits paid out is spent by Congress. What the Treasury Department does is give the Social Security Trust Fund non-marketable "special issue government securities" that are simply bookkeeping entries that are IOUs.
According to Social Security trustee estimates, around 2016 the amount of Social Security benefits paid will exceed taxes collected. That means one of two things, or both, must happen: Congress will raise taxes and/or slash promised Social Security benefits. Each year the situation will get worse since the number of retirees is predicted to increase relative to the number in the workforce paying taxes. In 1940, there were 42 workers per retiree, in 1950 there were 16, today there are 3 and in 20 or 30 years there will be 2 or fewer workers per retiree.