Sure, there's plenty of evidence to support the benefits of a singular craft union for professional aviation workers but the majority lack the will to make it happen.Isn't that enough evidence to get a industry wide card drive to unite all AMT's into one organization....whether it be AMP, AMFA or creating a single labor organization named "BAM" Brotherhood of Aircraft Mechanics.
Do you think it would work if this labor union assigned each member a job? Say, today you work at AA and next week, month or year you work at UA. Mechanics would be qualified by the union on all equipment. Mechanics wouldn't make side deals with management. You work for the union!