What you need is a union law similar to germany. In germany, when you apply to a job where a union has created a union employee contract (ie, standardized pay,

What you need is a union law similar to germany. In germany, when you apply to a job where a union has created a union employee contract (ie, standardized pay, standardized hours & benefits), then you can choose to use that contract even if you are not part of the union and you are entitled to still do your own contract even if you are in the union. The only time you have to accept certain parts in your contract no choice is if they are mandated by the worker's council, which is voted for democratically by workers from and for a specific company and they can veto anything the company does or demand changes with a 50% share in board votes.