I say it is Ponzi in that it always bets on future generations contributing enough to cover payouts.
Correct and you are not at all alone in this statement.
There is NO (un)Social (in)Secure trust fund, never has there been one. It's another of the many ILLUSIONS, like Rights and Liberties.
ALL MONIES paid in taxes go into the General Coffers
to be used for whatever purpose/purposes deemed as necessary, like funding for the many wars that have been, are ongoing, and will become.