A minor's union has to make sure that all their members, thus more or less all miners, keep their work. It doesn't neccissarily have to keep all mining compani

A minor's union has to make sure that all their members, thus more or less all miners, keep their work. It doesn't neccissarily have to keep all mining companies alive, but if it would consolidate into a single mining company with (initially) good conditions it can't be in the union's interest as then all mining employment power is in one place. They have to find the right balance.