One quote I heard recently that will stick with me (credited both to Joseph Heller and Kurt Vonnegut, Jr but the quote is still good) is that, upon hearing that somebody else was making considerably more: "I have something he doesn't have-I have enough." It's a paraphrase, actually but you get the drift.
People like Drumpf, Elon, et al will never be satisfied with what they have, and most likely can never truly enjoy it.