This choice has been codified into law as the minimum wage.
The piece mill rate can pay better, but has some of the same risks as the plant owner.
People choose the smaller steady check over the bigger check with risks.
The plant owner assumes the risks, and gets the reward if any.
The labor cost are reduced to a commodity.
I have always told students, when they get to a company, try to make themselves a resource,
as commodities are replaceable.