Only talking about negotiating in different economic realities. Private sector unions have to negotiate in the reality that the businesses their members work for have to turn a profit to remain in business, and if the business fails, so do the members employed.

This is not the reality of a public union's negotiations. It's plain and simple and should be obvious to even the most casual observer.

I not speaking to workplace protections, just the stark realities of negotiating with one union have much to lose in over demanding, and one union where this is a remote consideration.