My pay and benefits were hard fought for and won by my union, including back pay through arbitration when we got stiffed on pay for a particular part of our job for a few years.
When I have a problem, I go to my supervisor. Usually things get fixed. If they don't want to fix it, I go to my union rep and things usually get fixed fast. If they don't, I go to my union grievance officer and things definitely get fixed fast. The last thing my supervisor wants to do is deal with the union rep, let alone the grievance officer, so having those 2 backing me up goes a VERY LONG WAY over just dealing with my supervisor by myself.
Don't believe the propaganda from people with a vested interest against your rights as an employee...
100 percent true. Going to the union is the last thing I want any of my people to do. It just complicates things.
Fortunately, I and my fellow supervisors are all union members too and we all know and are on good terms with the union officers down at the hall, so even if someone does go straight to them, it's usually worked out with a phone call. The key is to be fair and not be a dick.