I don't know, look at some of the cities around the country going bankrupt as the bill comes due for union-imposed obligations. I'm not against collective bargaining, but it seems like unions as they were known fifty years ago were destined to eventually collapse and/or make their communities eventually collapse.
Now, collective bargaining could just be a cyclical thing- power to the bosses, power to the workers, power back to the bosses. We could be approaching the swing back in the other direction.