You have options choose a pay structure as a union. There is not a single pay structure to which all unions must adhere.
The suggestion is that Joe and Sally must be paid the same even though Joe is "useless". That is not the case. When creating a union, you can choose a different pay structure. The Screen Actors Guild, for instance, has very wide variation in how much members are paid.
The suggestion is that Joe and Sally must be paid the same even though Joe is "useless". That is not the case. When creating a union, you can choose a different pay structure. The Screen Actors Guild, for instance, has very wide variation in how much members are paid.