Unions are shrinking and their members are aging. Their traditional bastions in the construction trades and manufacturing have withered, and they've had deep trouble breaking into the service sector -- especially at big retailers like Wal-Mart that have had great success fending off the UFCW in particular. In the big scheme of things, they have very little lose by trying to cultivate a new, more labor friendly industry, albeit a highly speculative and technically illegal one.
Unions trying to sell weed
the USPS should get into that action too, then we'd have 2 dinosaurs staying relevant.