The real "original sin" of the free internet is the curation of the experience of using neutral information systems to drive engagement and skew users decisions away from their own interest towards the commercial interest of the web sites. Routine deception and manipulation mean that there are no clear lines or defensible moats of freedom. There is no rule of law or communal standard of fairness on the internet. This…
I have not heard a single country that have managed to do this. For rather obvious reasons, it is not practical to make employment illegal where the employee is in need of money.
There are countries however that do treat the problems with prostitution as a labor rights issue and resolve it similarly. For example when people think of human trafficking they think of prostitution, but human trafficking in constructions is actually several times larger. Exploitation in construction is thus a very large problem and the common solution is to impose stricter regulations so the government can catch and punish those that earn money on human suffering.