well lets make a deal If you quit I'll quit and we all will quit! We'll form a "Union" and if they hire one back they will have to hire all of us back at a better wage.If enough coal miners quit then the treatment would improve. Supply vs. Demand is not only about wages.
Unions in the U.S. are about graft and corruption. They may have had a place historically in improving working conditions, but today they are simply about padding the pockets of union bosses while doing nothing for the workers.