More digression-
Twenty-two states have Right-to-Work laws.
Payment of union dues not required in these states. A good thing too, as unions tell workers who to vote for and make big donations to politicians. A 'union shop' is permitted, but the union can't tell an employer to fire or discipline a worker.

In Canada, national unions are largely confined to those that are extra-provincial in character (railroads, etc.); others are governed by provincial laws.
Some, such as the Ontario Teachers Union, are large in an economic role, owning $97 billions in real estate and businesses, some overseas(gambling in UK, communications including satellite, over 35 percent non-Canadian in all).
It holds over $2.9 billion in OGX petroleo, $700 milion in Deutsche Telekom, $1 billion in Transurban (toll roads, etc.).
It offers class B shares to investors. In 2009, the Fund gave 13 percent return to investors.
Two of the Ontario Teachers holdings include over $250 million in Transocean (driller of the BP blowout well) and $200 million in JP Morgan Chase.