You will get paid an amount based upon your contributions to the fund. That's what the government owes you for your SS contributions, and that's EXACTLY how a defined contribution pension plan or annuity works.
Whether or not you will get the amount promised - and I don't think you will - is another story. But the economics of how SS works is no different than any other pooled capital of retirement savings.
Actually, other "pooled capital of retirement savings" typically involves actual money, not IOUs the pool wrote to itself. And the amount I get paid is irrelevant to the discussion because there is no connection between the amount I will be paid and whether or not those IOUs government wrote to itself are a "trust fund" or not..
What is relevant to the discussion is that the amount we get paid has nothing to do with whether SS has a "trust fund" or not, and there is no connection between what our children will pay and whether SS has a trust fund or not.
There is no cashflow connection to anyone regarding whether the government's IOUs to itself are considered a trust fun or not.
All other financial securities as assets affect cashflow to someone somewhere somehow. Social Security's phantom "trust fund" doesn't.
Seriously, with what you do for a living, and I do believe you even if we banter sometimes, how can you possibly consider something that EX-ANTE has no effect on cashflow, positive or negative, ever, to anyone, an economic asset? How is that possible?