it cannot be voted in

Technically, it can.

simply ask a billionaire to not be

One doesn’t have to ask; under the very same Due Process Clause of the 14th Amendment, the legal argument would be, theoretically, that the vast accumulation of wealth and its legal and political ramifications violates the life, liberty, and property of other citizens.

The dissolution of the union and the United States government is also possible with the ratification of 2/3 majority of the states.