all employees in a union shop are subject to the same collective bargaining agreement whether they are union or not.

This law would make all workers in a unionized shop have to pay their "fair share" of union dues- the cost of their share of employer relations and collective bargaining, without the higher cost assessed to union members to fund unionization and political activity.

The law would give the union their share of the benefit that the non-union workers enjoy under the law.

Apologies if I misunderstood the question.