I agree, the GP comment makes no sense. Prices of important things like homes are set relative to income, so it's relative income that is important, not absolut

I agree, the GP comment makes no sense. Prices of important things like homes are set relative to income, so it's relative income that is important, not absolute income. Most people judge their affluence in terms of evaluations like: "I make enough money to buy a nice house in a nice neighborhood".