Would it not be accurate to say that in a nutshell it all boils down to mutual respect as the ethic of justice? Our accepted view of a just society entails liberty and equality. A requirement of mutual respect follows from equality. A society governed by mutual respect would maximize the liberty that co-existing people can share simultaneously. The point is that we don't have that far to go in our ideas about justice to become a far more just nation.

If curious, one explication of society governed by mutual respect, including the economic system, is in "Equality Is All We Need” (here in Medium, but not behind the paywall).