For the swing voters that want a couple percent more, say 3%, here is a back of the envelope calculation for an average 88 Capt flying 85 hours. For those who can't vote yes for anything rational, disregard.

To get the same deal at the amenable date, you now need $8445 additional dollars above and beyond the TA in order to break even. Pay rates would have to be .9% higher to recoup lost TVM. So lets say a swing voter wants 3% more in compounded rate. You need to add .9%. Lets round up to 4%. Not too bad.

Lets go amendable date plus 6 months:

You would need to recoup the $23,460 left on the table of original deal. This means an additional 2.6% must be added to your goal of TA plus 3% for a total of 5.6%. Starting to get ugly. TA is a 21.5% compounded raise, and now you need 5.6% more for your goal.

1 year past the amendable date you have to capture an additional $38,760 to break even. That amounts to 4.4%. Add in your goal of TA +3 and you need to see 7.4% more above and beyond the 21.5% of original TA.

I'll stop there because it gets silly beyond 18 months, just ask SWAPA. They have lost a gargantuan amount of money over 3 years.