This is why. And for good reason. Public unions have a monopoly position that gives them undue bargaining power. Their campaign cash—collected via mandatory dues—also helps to elect the politicians who are then supposed to represent taxpayers in negotiations with those same unions. The unions sit, in effect, on both sides of the bargaining table. Spinless pols roll over and play dead for union demands, after all they are not spending their money, they are spending our money. This is why such famous political friends of the working man as Franklin Roosevelt and Fiorello La Guardia opposed collective bargaining for government workers, even as they championed private unions.