Big business has evolved and learned how to deal with labor. They have lawyers and professional negotiators. Labor, on the other hand, is moving in the wrong direction.
ALPA could help in all of this, but they don't. They take a back seat and let the little MEC's work it out for themselves. The Union guys at the majors do not care what is going on at the regionals. Heck, most of the Captains at majors have no idea who Envoy is.
What if all of the AA and US guys slow-taxied (or called "nil" breaking with even the slightest amount of snow to cause major delays) until Envoy had a good contract? What would have happened then? That is power. These are the things that used to happen.
A MEC whining about their contract is not power. It does nothing to motivate them to pay you more. Until you can give them a reason to pay you more, they won't.