Interesting point to bring up. For a while now there's been a certain ruckus about a particular model of prostitution that Europe has been using to mixed results, it's called the Nordic Model. Essentially what this does is that it simply decriminalizes prostitution but it still makes courting prostitutes illegal. On paper this sounds pretty good, protect the women working out there and punish the johns but apparently it hasn't been working out as ideally as one would hope, or at least that's what some people on twitter are saying.
Some people want to bring the Nordic Model to the US, and possibly establish a worldwide thing where this is used but alot of apparent sex workers are against it. Unfortunately I only have a loose understanding of this issue so you'd have to ask around to find out more.