A strange fact popped into my mind, after reading this story and remembering some comments on the "Turing deserves an apology" story. Many people will say that two consenting adults have the right to do whatever they want in the privacy of their own bedroom. As soon as the act those adults want to do becomes nonsexual (e.g. an unpaid internship, unlicensed medicine), that principle goes out the window. Very confusing…
The unpaid internship law serves to give some protections to the little guy.
Btw, I really don't understand why a billionaire (?) can't afford to pay hourly minimum wages to a bunch of kids.