Social security taxes explicitly pay for the current generation of retirees. it's not a pyramid scheme (how would that even make any sense?). The "trust fund" is running out of money but that could easily be solved if we were willing to tax the rich, corporate profits, and capital gains, at higher rates or more aggressively (that is not allowing corporations to escape tax so easily). Or we could continue to fund it at a deficit. But, again, it's not a pyramid scheme. That doesn't make any sense.