The way to reduce wealth inequity is to allow polygamy from a legal and social point of view. Very wealthy men would have multiple wives and where all their children will be accepted by society which would incentivizes quality women to choose to be one of many wives of very wealth men. In such a situation spending on all these families (wives and children) will dissipate the wealth and shift income downward in the wealth hierarchy toward those providing services for all these extra families.
What an idiotic idea. A large proportion of young men without prospects of marriage is a guaranteed recipe for violence.
Well, I was commenting on the isolated problem of reducing wealth inequity.
Also, at least in the USA, marriage rates are falling quite quickly despite gay marriage becoming legal in many states recently which means heterosexual marriage rates are falling even faster then recent numbers would suggest
In other words, the market is not clearing anyway so you might as well shift the dynamic
Also polygamy would fit historical pattern (we have twice as many women ancestors than man ancestors which would imply half the men in history never had any offspring and any man that did have offspring had on average two women partners) which are unlikely to change
https://www.theguardian.com/science/2014/sep/24/women-men-dna-human-gene-poolThe only issue is would such a dynamic take place in the open of in secret.