People who have done well don't use SS as a backup.
People who have done well need Social Security as a backup, in case they do not do well in the future. For instance, I will retire with a fair amount of money, but if I lose it, Social Security will be there for me.
Or I might die the day I retire, and get nothing. But my Social Security contributions will help others who do outlive their savings then.
If Social Security just returns what was put into it, it will just be a copy of everything else, and useless. It provides insurance against running out of retirement money.
Prove you do well financially. Show your tax returns like you demand Trump shows his.
I actually do get audited by investors, much like trump should be audited by his voters.