This is more like a guild than a union. There is no discussion of leveling pay or anything similar. The doctors, lawyers, actors, musicians, and other profess

This is more like a guild than a union. There is no discussion of leveling pay or anything similar. The doctors, lawyers, actors, musicians, and other professions have guilds like this. What makes them work is that there is a limited supply of available experts in the field, and a desire to raise their bargaining power.