As with most major airlines around the world, their pilots have an understanding that you don't vote for your colleagues to lose. Only gains for ALL groups have a hope of passing. That is how the US majors have their pilots at the top of the earning tree. Their unions don't even consider a proposal unless it benefits everyone. Certainly, attacking the upper end is a losing proposition for those at the lower end, as most intelligent individuals realize that to remove the higher reaches of your own career is slow motion suicide.