Talk about stating the obvious! Of course its the young guys moaning about the seniority system, just like its the old guys trumpeting its merits from the top of Mt.Blanc.
Zulu makes an excellent point though- hours flown. Maybe that could be expanded to involve sub-categories like hours-on-type, and even hours-with-company.
Surely that would be better than getting stuck with a crummy company, with crummy pay, with loads of experience but the only alternative is to move over and become #3507. More of a "worldwide" seniority system, with a few twists.