I always thought that coerced contracts violate the 16th Amendment.
I’m pretty sure the 16th only pertains to taxation.
That said, the 10th Amendment forbids, to the federal, all possible powers that may be construed besides those actually enumerated.
It’s simple set theory.
There is a finite, limited set of delegated Powers.
There is the theoretically infinite diversity of all other possible powers ... all forbidden.
In Marbury, Marshall outlined the two important things to consider when looking at the Constitution: the specific theory of written constitutions employed; the original right of those that Ratified to make what they agreed to the Law. The modern court acts as if neither matters. Even Scalia observed at one point that if such things were once again accepted the theory of modern jurisprudence would be invalidated.
Which highlights the fix we’re in. With the Court we aren’t approaching honorable men and women so that they preserve the Law. Instead we are approaching lawlerly whores and worse, being made to beg them to not rape us too bad this time....