Bus driver Bob: "320s are more profitable and more pax/revenue are on them than the 190s, so the pay should be higher. And besides, our future is all 320/321s so we shouldnt waste negotiating capital on 190s."
Frank the tank: "That's interesting Bob, if our future is 321s, and if they carry a lot more people than a 320, and if they are a lot more profitable than a 320, how much more do you get paid per hour to fly a 321 than a 320?"
Bob: "Shut up RJ driver and get your facts out of here. Bid off it if you don't like it."
Frank: "Sounds like I instead need to bid off blewjet to an airline that pays all their pilots adequately, not stay at one that might possibly one day pay 3/4ths of their pilots adequately."