I'm not against those who work for sex, but the idea to earn for a living doesn't seem nice. IMO, sex should be for 2 people (or more for others who prefer polyamory) who wants to be intimate/romantic with each other. My point is money should not be the purpose.
If you want the benefits of society you must contribute. Put your money where your mouth is and go start a hippy commune somewhere.
Work as much or as little as you like! Benefit from the fruits of your own labor! Don't ask for a steel ax or nylon tent though. Such goods require an industrial society.