Believe it or not, Epstein is not that wealthy, compared to Bezos and Gates. True wealthy is measured in how much liquid assets a person has. That's why many "wealthy" people in 1929 were suddenly dirt poor because most of them were paper rich and not cash rich.
The FBI doesn't want Epstein for child sex trafficking; they want him for the information he has. Can you imagine how many people will fall from grace when Epstein starts talking? Oh marone! Right now, they have to keep him on a military base or underground where no one can reach him. You can rest assured Epstein has a price on his head. He doesn't have enough money to buy himself out of this. They have him on the hooks.
When this is done, many VIPs and celebrities will march straight to the pokey. However, Acosta isn't even big fish. He's just bait. This is bigger than taking down the mafia.