the other wives are just shack-ups, that is all the “legal” standing they need and its not illegal
What is illegal is trying to say they are all legal “wives” which is stupid.
No changes in the law are needed
The abnormal are never happy until the normal are forced to accept them. Once they become accepted, they will immediately gain minority status with all the accompanying perks.
Rinse and repeat..... until the new abnormal is the old normal.