[bccdee]

> That is maximally efficient, economically speaking.

It is not. The resources which went towards that mansion would be (by your definition) much more efficiently spent elsewhere. The utility which one wealthy person gets from a 20k sqft mansion is much smaller than the total utility which 20 homeless people would get from a 1k sqft apartment.

[hellojesus]

What utility is the person from whom you stole wealth getting from homeless people being housed vs their mansion?

My answer is economically efficient. Yours is utilitarian. I believe in private property.