We (The Entire Mainline Industry) Can NOT Give Up One Inch of SCOPE~

Once you give up any Scope, it will be almost impossible to get back...
Once you give up any Scope, you have also just made it harder for the next group to hold the line.

Once Airline A and their Pilot Group gives up Scope on the 70/76 seaters, then Airline B's Pilot Group will have to try and hold the line at 70/76 seaters.. and might actually end up moving it to 80 seaters! Then comes Airline C and the new line becomes 80/88 seaters...
Then you throw in one bankruptcy, and you have 88 and 90 seaters being flown by the Regionals for some Mainline Carrier.

Keep in mind, the 757's will be retired over the course of this decade. To be replaced by (most likely) 737 Max's.
So the Company lures a Pilot group with the bid of "New Aircraft" for Scope relaxation- They buy some 73M's and maybe some CSeries or something similar.. and also throw in a 76 seater at a Regional.

Now we see a 75 get parked and instead you're flying a 73M but someone below you is flying a CSeries and someone from another list is flying that 76 seaters..
You've taken a paycut, and that RJ Pilot is probably flying a 76 seater at 50 seat wages.. and next contract the company will tell you that they can't afford the rate on the CSeries (or equivalent). (If those "lure" aircraft even show up)

Guys, please tell me you can all see the forest from amongst the trees~

Motch