Only if you believe that the monies paid into SS is embodied in the treasury securities held in the SS trust fund. It is not, the reality is that the money received for SS is spent on other things.
A treasury security sold to some entity other than the government is a asset backed by the full faith of the U.S. government. A treasury security sold to another government entity is worthless because the government is both the bond holder and the bond issuer, both entitled to the payoff and...