Not to mention Lawyers.
The civil court system is basically a way for wealthy people and corporations to use money to silence and/or coerce behavior out of less wealthy people. If Elon Musk or Larry Ellison woke up one day and decided to sue me, and defending myself would cost 100X my net worth, I'm probably just going to give up and do whatever they want me to do.
There still is something to it. You could bring your billion to Dubai and it might buy you some pardons from personal indiscretions and a cadre of quasi-slaves but the monarchs would never grant you real systemic political power.