The problem with trying to restrict the supply of money without removing the demand is that it is very hard to police. There is also the citizen’s united ruling

The problem with trying to restrict the supply of money without removing the demand is that it is very hard to police. There is also the citizen’s united ruling from the supreme court that makes it unconstitutional to restrict political advertising. Much better to remove the need for advertising rather than try to police where the money comes from. Of course doing this is not easy, but it is the only solution that will work.