I have said for a long time that Social Security is unconstitutional, on the basis of the Tenth Amendment--that particular power has not been delegated to the federal government in the Constitution--and the Thirteenth Amendment, which prohibits involuntary servitude. Forcibly taking money (the fruit of one's labors) from some citizens, against their will, to give it to other citizens--that is a form of involuntary servitude.
I’ve done the exact same thing. Direct Taxation, taking people’s money against their will, (non-voluntary) in effect constitutes involuntary servitude. It is a violation of the Thirteenth Amendment.