Actually I think that you're just looking at the situation from a different angle than many of us. The reason I have some distrust of unions is that they sometimes seem to promote inefficiency as a policy. The distribution of money problem is actually orthogonal to the problem of "how do you do task X most efficiently". If a machine can do the work of 10 men, then to have those 10 men doing the work of the machine is literally wasting their lives.

I wish that unions pursued more contracts of the form "we get X percent of revenue/profits" and then distributed those profits amongst their membership the way they saw fit. This way decreasing the amount of work per person does not decrease the amount of money per person and business and union interests are aligned. I'm sure there are practical reasons why that's difficult though.