No. Social Security is not a Ponzi scheme or pyramid scheme... it's a Pay-as-you-go scheme, and it's legal because it's run by government.
You are kidding aren’t you?
It's a government run Ponzi scheme. The earliest participants enjoyed a large benefit from a large and growing base of "contributors". They took far more than they "contributed". We're reaching the end of the party as the ratio of "contributors to beneficiaries" winds down from 10:1 at the start to 1:1 around 2018. Game over.
The end is coming sooner as the politicians have been spending all the money "contributed" in excess of the ongoing obligations. That slush fund will be gone very shortly.
But, but, but,.................the Lockbox,..........what about the Lockbox?
Say it isn't so!