I have to agree with Galaxy Flyer on this one. Major Airline pay is going to be on par with or above Vice President/President/CEO pay at a lot of corporations. It just isn't going to happen outside of the Fortune 50 or possibly 100. It will remain cheaper to pay well below that and just type new guys every 2-3 years. Department manager or Chief Pilot pay will go up because they need to keep experience around for those positions, but line pilot? Not so much.
So how does the 91/135 side stem the attrition? My opinion is that QOL is going to have to drastically improve. Known days off and scheduled vacations would be a great perk and would cost very little to implement. It doesn't matter if a pilot only works 10 days a month if he/she can't schedule a vacation.