You must be new to this business. So here's a scenario for you. There is some black swan event for airline X. Their pilots will be taking massive pay cuts and concessions. But... they can go to airline Y, where you work, and slide right in. Where do they go? 1) bottom of the list? Or 2) in front of you?

A national seniority list is a hideous idea unless we get paid by "the union" and that would make it way more susceptible to corruption.