A lot of retirement systems fall into the same category.
Some say Social Security is a Ponzi scheme. In many ways, they're not wrong.
The Stock Market? Most stocks in the stock market meet the SECs definition of a Ponzi scheme.
I am from Illinois. I know two retired high school principals that get over $150K per year, and a superintendent who gets over $200K. At least two of them “spiked” their salary during their last year of employment to add about $15K to their retirement. The Illinois retirement system is obscene. No other state should have to help fix it.
The Stock Market? Most stocks in the stock market meet the SECs definition of a Ponzi scheme.