Except for people thrown over the rails. (Tristol)

And

People who come and go as the please (Lue-Reeq)

And

Those who lose their job (Olvara)

And

Not to mention WoL and Alphinaud walking out the front door after insulting Vauthry to his face.

(I just thought it was funny since they used the no one ever leaves thing as a plot point a couple of times)