But the macro-economy is not the Whole. It too is a Part, a part of the larger natural economy, the ecosphere, and its growth does inflict opportunity costs on the finite Whole that must be counted.
I don't accept subtractive models of love, only additive ones. And I believe that in the same way we need species diversity to ensure that the planet can go on, so we need this diversity of affection and diversity of family in order to strengthen the ecosphere of kindness
Fairness is an efficiency parameter if we look at the whole global civilization. It is not an efficient way of meeting human needs if one billion people starve while another billion have excess. It would be more efficient to distribute resources so that at least vital needs were met everywhere. Otherwise, for example, if kids are starving somewhere, dad goes out to slash and burn the rain forest to feed them - and so would I if my kids were dying. And this kind of destruction is everyone's problem, because we live in the same ecosphere.