Simple, if it isn’t part of the 18 enumerated powers of congress, then it’s gone.
The feral govt could be reorganized into 18 departments, and rather than naming them, they should be numbered... according to the order in the Constitution. Department 1, Department 2, and so on.
That sends the message for later that if some statist wanted to add a 19th department, he damn well better get an amendment first.