Writing at The Arts Mechanical, J.C.Carlton asks the question, "What can a billionaire buy that most people can't?" Carlton's answer: influence, for which s/he cites examples like Soros, Steyer, and the Koch brothers. That's certainly correct as far as it goes.
Rather more visibly, a billionaire can "buy" one or more high quality supermodels to adorn his entourage, and many do just that. Extremely wealthy women and their "toy boy" tennis coaches or trainers are a thing, too.
It seems likely some billionaire's legal team invented the prenuptial agreement. Apropos of which, Donald Trump is the current poster boy for trophy wife acquisition and display by a billionaire. In an earlier era Aristotle Onassis snagged a glamorous presidential widow, while Prince Rainier landed the coolly beautiful Grace Kelly.
An enormous pile of money is a potent aphrodisiac.
