Everything we do in life has a cost. Presidential politics has always been living proof that politics has a price.
If you are a wealthy lobbyist with an agenda, you know you can purchase the influence you need to do most anything. The system has been nothing if not reciprocal. Lobbyist gives money to candidate, candidate writes bill/votes/kills said idea for lobbyist.
But it goes deeper.
Money in D.C. determines not only who is elected, who gets rich, who is prosecuted, who has power, but it also determines who has jobs at all levels of all bureaucracies, who gets to choose the next leader at all levels, who gets the $250,000 speaking gigs upon retirement and, in some cases, very literally, who gets away with murder.