It's a false ideal to think that we can agree to worse T&C's today to save jobs and then when things are brighter we'll have them back.
Once they are gone, they will be gone forever. We either refuse to accept them point blank (and accept that will mean management say some pilots must go) or accept them and by doing so accept that things have changed permanently.
When profits are good we'll get thrown some crumbs and it'll be marketed by management as a bonus and something surplus to what we deserve ... and we will take it and laud their generosity.
Cue next crisis ... rinse repeat.