It's not hard to solve this. Downgrade prostitution from crime to misdemeanor and ask the police to not really investigate it, classify sex with virgins as a therapy (which it is right now) and allow every doctor, nurse, chiropractor anyone remotely associated with health to receive money for it, make insurance companies to at least partially cover for it, and the problem is solved. There's no need for "rape is legal" edgy BS Manga sometimes goes for