When the 3rd group you are bringing in has good relations with you already after your friendly talks to help them, bringing them in will get rid of the majority bloc from the east (old US) and get everybody to shut up and work
Yawn, this is why workers shouldn't waste time with all the bargaining crap. If management wants to do stupid power play moves to steamroll you might as well just get off the usual script. I've never worked anywhere dissatisfied employees couldn't grind it to a halt from the inside. Then of course you'll get management and all the keyboard jockeys moaning and whining about respect and fair play. Oh well, they don't care about you anyway.