I'd approve but you have to create a whole new set of circumstantial laws to fairly regulate it...

The following purportedly happened in Germany soon after they legalized prostitution. Apparently a brothel owner was perusing the local unemployment lists and saw a particularly good looking woman therein. He offered her a job which she turned down...

...causing her to immediately lose her unemployment benefits because she turned down a legal job.

Here's a link to a news article

(Now wouldn't that make for an interesting bdsm-story... a society where innocent young men and women can be "drafted" for service in legal sex dungeons, where they are at the mercy of well-heeled doms and dommes.)