All of us agree that nobody should be forced into prostitution.
Some of us think that people who want to do prostitution of their own free will should have no restrictions. Others think that such people deserve mental therapy.
Currently the official Green Party stand is that prostitutes should not be punished for doing prostitution, but their customers and pimps should be prosecuted if they are discovered. In theory this gives prostitutes a degree of legal power. But in practice, police and prosecutors still find ways to persecute prostitutes and pimps. This is called the Nordic Model. It got very good reports when it first came out, but increasing criticism with increased experience.
The main alternative says that prostitutes, pimps, and johns should all be legal. But forcing anyone into prostitution should be very much illegal. In practice, police and prosecutors still find ways to persecute prostitutes and pimps. This is called the New Zealand Model. It has gotten very good reports from early users, and is beginning to get increasing criticism.
Whatever our opinions about voluntary prostitution, we agree that “trafficking”, forcing people into work they don't want, is bad. We don't have adequate ways to stop it. Our various approaches to make sure that everybody can survive whether they can find work or not, should help keep people from being forced into prostitution by sheer poverty, at least.