I don't think it's a sense of entitlement, but a sense of profound distrust. I know the UAW has gotten out of hand, but it seems to me that it's due to a fear that without the various clauses in their contracts, the management would fire everyone and cut pay and so on. Maybe this fear is fostered by union leaders who stand to benefit from it - and in the UAW, I think this is the case - but I can understand where they must be coming from.
You have mentioned the special case of Chrysler back in the day, where the unions and the management had begun to cooperate and try to understand each other's position. I think attitudes like 'kill all the unions!' just strengthens fears within the unions that they are going to get mistreated by management, and that serves to encourage labyrinthine contracts in order to ensure their safety. Is this fostered, in some degree, by some union bosses (especially in the UAW) who want to stoke the fires of mistrust in order to get some perks for themselves? Probably. But I don't believe that the people within the union do things purely due to a sense of entitlement. Everything comes down to distrust of the management. Why do a good job for the enemy? Why make concessions to the enemy? Why not take advantage of the enemy?
If management would take steps to ensure they aren't perceived as the enemy - and don't do it in a patronizing way, natch - the unions wouldn't be as much of a problem. But because of that, and of anti-union sentiments like your own, there's going to be a perception that the people within the union are threatened, and they will be less likely to make concessions, do a better job, and so on.
I don't claim to be a labor relations expert, obviously, but I have been considering both sides here, and I can't see how they would solve any problems by cutting out the UAW so long as they keep up this antagonistic attitude. The reason the UAW can't get into foreign factories seems to be because the workers there don't see their management as a threat, and don't need the protection of a union.
It's all grounded in fear and mistrust. Eliminate the fear and mistrust, and you'll have good labor relations. Keep it up, and you're going to have unions forming no matter where you go. Look at Wal Mart. Closing stores hasn't stopped people from trying to form unions.