Land/housing ownership is also the single greatest barrier to building generational wealth. Owning land is what enables you to keep the output of labor, whether it's yours or someone else's.

Sharing land equally is neither good nor bad for the middle class, only fair. It's good for working class people who don't own land, and it's bad for wealthy people who rent land to others. People who own their own homes and workplaces? Largely unaffected. (Though it depends on the location.)