It seems to me that the unions are more afraid of the union dues payers who don't support the union more than they are of the Republicans who are trying to "bust" them. What the Republicans are doing is just giving the dues payers the choice not to pay. It's the fact that they choose not to pay when given the choice that actually busts the union. The republicans aren't trying to prevent anyone from joining a union and paying union dues.
Many of these govt union contracts disallow the state from laying-off the employees under contract no matter whether the state would have to carry a deficit or not. I understand it's this kind of thing (as well as the ancient pension programs) that is really hurting CA?
in california the problem is the guaranteed raises and guaranteed pensions. another problem is layoffs are almost soley based on seniority which of course breeds laziness and also ensures your most expensive workers keep employed. what you speak of is a problem. in los angeles some of the unions have contracts that if you lay off workers you ahve to give the rest of them a raise. kind of counterproductive obviously.