Sounds like a good idea, but starting with mesa is not...
After the scorched-earth campaign that OJ has waged across the industry in the last decade (eagerly enabled by 51% of MAG pilots) the idea of honoring their seniority post-liquidation is laughable.
The only way for this to work is if a punch of pilot groups agree IN ADVANCE OF CRISIS to do this...kind of like insurance. Nobody is going to let you buy into their flood insurance pool the day the river reaches the top of the levy.
Now is not the time to make such an agreement...some companies are obviously in worse shape than others.
BTW, ALPA would never have the guts to propose anything of this sort...it would be bound to offend some dues payers.