Actually, you have good point. Mergers between airlines with different unions, no unions, or any variation thereof, have the advantage AFTER the cultures are immersed. The Division is inherited from within.
However, The Company knows that division is beneficial to prolonging negotiations, and creating animosity between members, and their respective unions(s)...
The "Agenda" only comes into play when one is attempting to exasperate this situation. Now... we know the company benefits from this division financially, so I'm certain they would attempt to perpetuate it through any legal channels available to them.
Why not? --It's a lot of bang for their buck!
>SPIT<