Even a small government still has courts, in fact they would be a far more sizeable fraction of the government and thus a lot more effective. So if people like Epstein engage in criminal behavior, or even just unlawful behavior that they would be liable for, they can definitely be held accountable.
Courts are only a remedy if you're breathing. If the cyanide penis pills kill you and your family then who is left to file suit?
What stops me, a multibillionaire, from hiring someone to shoot the small government judge in the head?