Wait, what are you saying? Employment should be predicated on the employer giving the employee an adequate monetary reward in exchange for an adequate monetary reward for the employee? And if either side isn't getting their adequate monetary reward, the job shouldn't exist? This is a radical concept!

Seriously though, perhaps I'm just cynical, but I seriously doubt that such internships won't be offered. Companies get monetary gain from interns, otherwise they wouldn't spend any time and effort on them (even if not money). I think the simpler answer is that companies are just cheap. I mean, experience is great and all, but if money is being made off of a person's labor, then they deserve my cut. How large that cut should be is up for negotiation, but that they deserve a cut shouldn't be.