No they aren't, they are organizations that utilize collective bargaining in place of productivity or efficiency increases in the labor force, thereby diluting

No they aren't, they are organizations that utilize collective bargaining in place of productivity or efficiency increases in the labor force, thereby diluting the labor market with an artificial baseline at levels lower than the market would dictate otherwise. They don't transfer any value, they just reduce the overall value of the industry and provide the illusion that union members are receiving a satisfactory portion of this reduced value.