The prime issue with public unions is that once you have a bad worker, it is almost impossible to get rid of them. Private sector unions protect thier own, but realize that if the company is to survive and thier jobs still exist, people who cant or wont do the work have to be let go.
That is an issue. But it's not the prime issue.
The Prime Issue with public employee unions is that they pit public employees against The Public/The Taxpayers.
I actually came across a good argument for public sector unions recently, and have to admit I see some use for them now. They can serve to insulate the workers from politicians, and that does make some sense. There are other ways that might work, but unions seem to be the least problematic that I can think of.
The problem comes in the collective bargaining for benefits. Defined benefit plans sound great in the abstract, but they are all but impossible to pay for. The private sector, since it has to actually run on a profit, was able to sit down with the unions and explain the problems. This resulted in a shift away from this type of pension, and it has all but disappeared from the private sector.
The public sector does not have this problem, so the politicians, and the union officials, both used them to get votes. This delivered a reliable block of votes to whichever politician made the most extravagant promises, and kept the union officials in a cushy position with even better retirement than the members got.
Now that the bill is coming due someone has to pay, and the unions officials, and a few politicians, are still trying to convince the union members that it does not have to be them. Someone needs to sit down with those union members and show them that no one else can possibly pay because the money simply does not exist. I feel bad for the members because they were lied to, but I cannot preform miracles, and neither can anyone else.
Breaking the union's power to collectively bargain may not be the only way to convince union members that this is fiscally impossible, but the only ones who will really suffer are the union bosses and the politicians who are still lying to them. I see no reason for them not to suffer, and I actually like the idea that they will not be able to keep lying to the members, and riding their votes into a secure position with no accountability with reality.
Break the unions so that the liars suffer. The teachers will suffer also, but they will ed up suffering more if we let everyone keep lying to them. That is the reason I like Christie, he is pointing out that he is simply telling the truth, and that if the members want to be angry they should direct the anger at the people who have been lying to them for years.