Exploiting? Can you please cite another industry that has the capacity to employ millions of unskilled labor people at $10/hr and ALSO allow them the freedom to set their own schedule?
It's clear you've never worked a minimum wage job before. Flexibility on hours is next-to-impossible at these jobs. If people are willing to make a few bucks an hour less for that flexibility, who are you to call it exploitation?
It's not like these companies are minting profits. The alternative is these people go back to work at McDonald's and also get no benefits while being scheduled at such bizarre hours they can't even go to school and educate themselves.
Shrinking the pool of employment choices for these people does nothing to help them actually get healthcare. My mind is still blown at how the American solution to workers not having healthcare is to attack individual businesses instead of looking across the Atlantic at how the rest of the world solved this problem.