@DasYochid
Do you think any experienced adult should work for $4 per hour from the employer and have to live on the generousity of customers?
It depends on the value he is providing to his employer. If he is an experienced, capable worker with marketable skills, employers will compete for his services, and he’ll get paid a lot more than that.
You made two points there – one about pay amount per hour, and one about putting the burden on the customer. I don’t necessarily disagree about the latter.