There is a lesson here (really 3):

1. When management takes it, they take it all, and they take it quick. If they say the "B" word - the bankruptcy word, or liquidity shortfall, or whatever hocus pocus snake oil they are selling to scare the super junior into voting scared and the super senior into voting for their pension; remember, it goes quick, and it goes fast, and you likely work the rest of your career to get it back.

2. When and if the union tries to get it back, it will only do so in an incremental fashion.

3. PBS is not "Preferential Bidding System." It has nothing to do with it. It is a trip assignment and manpower de-confliction system. It puts butts in seats. PBS is not like PBJ. PBJ is great. PBS is not. It will always be a give-back to management to have PBS on property, therefore the union should always start negotiations with a 750 million dollar credit. That's what it is worth to management in efficiency and staffing on an annual basis.