Fellow Bfisk!
The problem is those in unhealthy airlines where the management wants to destroy its employees T&Cs, no matter what, and they fight against any trial of union, negotiations, etc...
The "health" of the airline does not depend on the way the union workes. It depends mainly in the management.
If all airlines where like yours, no problem. But that is not the case.
Locally nothing can be done. Divided as we are, locally, we are easy preys.