I think many of these discussions focus too much on monetary measurements of economics and lose track of actual resources and the creative usefulness of people themselves. That’s why immigrants are seen as a burden rather than a blessing, and taxes are placed on productivity(income) rather than on consumption and waste. The useful value of people is being measured in context of those who measure money, rather than in context of future resource needs. What are humans doing to support the resources their great grandchildren will need in the future? What have humans done for the planet lately? Until these questions are front and center, no analysis of long term economics will ever make sense. Humans being selfish in stratified layers is not really any different than humans being selfish equally. As far as nature is concerned, we’re just the particular type of apes that show up to steal supplies and crap on everything.