I’d be willing to honestly entertain a national seniority system vs. a company one,
That may have worked in the days of goverment owned airlines an regulation but not anymore.
How do you treat the pilots of a carrier with international basings, or pilots of a foreign carrier with a basing in your own country?
How is one eligible for seniority in this national system? Is it having a current licence of that nation? How does that system adress people holding multiple licences who may or may not be a national of that country anyway?
Does this system actually fix any problems that exist in the system we know today, or merely create new ones?
The only argument I really hear against traditional seniority systems is that it prevents 'senior' pilots from moving from company to company without penalty.
Unfortunately it is a zero sum game and someone has to cop the penalty. I dont believe it should be the existing staff at a given airline, but those against seniority obviously disagree as I'm sure it wouldn't affect them.