> Because some people live in very high cost of living areas - high income alone is not sufficient. No system will be perfect, but the government certainly can

> Because some people live in very high cost of living areas - high income alone is not sufficient. No system will be perfect, but the government certainly can make adjustments based on dimensions like residence area. (They already do something similar with GS pay scales.) Similar income distribution programs exist in other Western countries (Kinder Geld in Germany comes to mind) so it's not like variations of this have never been successfully implemented before.