The market has previously decided unsafe factories and child labor is ideal. Often market forces are great but empirically they do not solve every case and as a society we must evaluate each case accordingly.
Cocoa for chocolate, materials for phones, etc show that the market continues to be just fine with practices like child slavery. Alternatives may exist but most companies are still "striving" rather than there.
the hypothesis is being an employee is better for the workers, and if so it's something they'd willingly choose if given the option. The current data says that's not the case, but would be an interesting experiment. If given the choice of the current setup vs one of being an employee, what would drivers choose.
