That depends on the writing of the law. If the law forbids a person to sell an illegal service, then the seller is at fault. If the law forbids buying a servic

That depends on the writing of the law. If the law forbids a person to sell an illegal service, then the seller is at fault. If the law forbids buying a service, then the buyer is at fault. It is easier to go after the seller/broker (pimp) then it is to go after the service worker, legally speaking, because the transfer of money is through the broker. Same thing happened with Trump in the hush money scandal. The guy who transferred the money (the lawyer) was at fault. The only reason by which they came after trump was that the books did not record the transfer truthfully, and did so falsely.