What are you? A socialist? It needs to be made clear that certain jobs won’t make you rich, or even comfortable. If that’s what you want you need to move to a better job because the underlying product won’t support the cost of you achieving that.
I think you are missing Chickensoup’s point. There are people that don’t have the cognitive ability to progress beyond menial manual labor jobs. I frequently go to a grocery store that has had the same baggers for many years. That is all they can do. The company is providing them reasonable pay with health benefits.