quadspeed
Good point, that concern was brought up and the angle of the CEPs argument is that of base parity, i.e. people who serve in SFO get SFO package, MEL get MEL package, HKG get HKG package. Across the board, parity on base.
I will get whatever that base has to offer when I get out of HKG (if there are any basing slots left in future when I can finally make a move!) as will any other person leaving HKG. HKG is the only base I can think of that has such a highly diversified contractual remuneration package, someone correct me if I'm wrong. So I think the argument is more about leveling the playing field, when you're in the same field.
Though if the based guys are out to fight for better terms and conditions justifiably, then I'm right behind them, they will get my vote 100%.