Could you please elaborate? I don't exactly follow. Nobody is forcing them to work for Uber. If what you mean is they have bills to pay, etc, it's not like Uber can just magically decide to pay $9/hr, they will likely need to cut most of the jobs at that point anyway.
Nevermind the fact these people work in terrible conditions. Nevermind the fact these people work with chemicals which are unhealthy. Nevermind the fact these people ignore traffic regulations because they need to arrive on time. Nevermind the fact these people are children who go down in dangerous mines with gas which can also implode at any time.
It is a fallacy. The real solution to the issue is far more simple: let those who desire takeaway food (or who desire diamonds, gold, or clothes) pay a fair price, so that the workers get paid a fair price.