Spicepilot,
The resolution is for establishing seniority, not longevity. No airline would EVER give in to paying for another airline's longevity. No NMB would EVER release a pilot group for self-help with other airline longevity on the table. And finally, no U.S. Government entity would stand for the national transportation system to be shut down due to labor strikes at that level. Even ALPA knows they won't acheive longevity protection.
You are wrong, my friend. ALPA has already been working on a longevity system that the regional MECs have all been discussing for making longevity portable. This has been in the works for about a year. Portable longevity would be negotiated into each contract. You claim that the NMB would never go for it, but that depends on who's NMB you're talking about. Yes, the McBush NMB never would, but an Obama NMB quite possibly would.