Well, you can always go to the board meeting and raise hell, and if you fail and they fire you you can go work for Kmart. No such luck with the unions. If you're in a government related union job there's nowhere to go and asking questions will get you fired. Big difference. If you don't play with the teacher's union or the nurses union there aren't lot of other games in town. And if you're a customer of the services of say, the teacher's union, you can't even opt out (like going to Sears from Walmart). You pay anyway.

Did you know that if you get a job that is considered "barganing unit" you have to pay union dues whether you join or not? That's why we need to put some kind of controls in.