Shep Smith and Juan Williams point out, on Fox News no less, that Governor Walker's crackdown on unions is politically motivated and has nothing to do with a fiscal crisis:
Shep is wrong, though, when he suggests that the pro-labor fightback is purely about preserving a major funding source for the Democratic Party. He may or may not be right that the disappearance of unions would be "game over" for the Democrats - it would certainly be very damaging - but many people like me are pro-labor and pro-union regardless of the Democratic Party. I support unions in Canada and abroad, and I would keep supporting them in the U.S. if the Democratic Party disappeared tomorrow.
Unions are about much more than funding a political party. It's about unions being a countervailing power against monied interests and corporate lobbyists. Now it's true that a big part of that countervailing power is expressed by supporting some political candidates over others, but it's a lot bigger than just that.