Mr. Slarberg is correct. Their plan to replace the guys leaving is to make the remaining pilots more productive. Eliminate 4/4,5/4 or make it so repugnant that they think your only choice is to switch 6/3,6/2. No salary increase on 4/4,5/4. They even want to make the remaining guys on 4/4, 5/4 baseless; spend entire 28/35 day rotation on the road with your 36 hours rest wherever you happen to be on day 5. Their way to force you 6/3. As Mr. Slarberg pointed out there is also another option.
Kudos to you Mr. S to broach the topic of "Mafia". This is culturally correct in view of who most of these individuals are. So sad when these guys do this thing when they know full well that every improvement in there roster makes another foreign colleagues roster worst to the same degree it makes theirs better. Shame on these guys.