It is not exploitation if it's voluntary. The business cannot enslave the teenager. They can simply offer a wage and hope someone bites. If nobody bites, they either need to increase the offer or go without the labor.
It is fine. I believe the Wagner Act, which prohibited child labor federally, is unconstitutional.
Everywhere child labor is a symptom of the poor. But I believe parents should have the ability to teach and labor their children as they see fit. Regulations against unsafe working conditions are fine, so long as they're implemented at the correct level, but the government deciding it knows better than the parent is always wrong.
You know this view is wrong. You can argue the children working in mines in various countries is "fine" then with that argument.
No.