Lots of talk about fairness of a non-seniority system but none how would it actually be played out.
Imagine you are looking for captains...
Seniority airline: first in gets it. Done, that’s literally all there is to the process. How can it be any more transparent in any possible way. Might not like it, but it is transparent.
Non seniority airline: erm... make sure your mate is the trainer doing the assessment?? 🤷♂️