You hit the point. Economy is all less an objectivity issue.
Economist think with a classist thinking. And I repeat my point, "how rich" is an issue that depends of many factors.
If you are single and your pay is x+Y+Z and you buy only Y+Z, you could will believe that you are rich bc y+z are(in this hypothesis) deluxe products and the other part (x) seems to be a lot of money to only u.
Then how about the people without education that drive a tolba and sell dogfood and make a lot of money(x+w) and buy Y+Z? What are they?
Anyway,then, you get marry and now just buy z,then you social class decrease or you are less rich?
So,you can see, how that classist vision hide the humanity aspects of human groups and see the economy like and objective issue regarding the money like the only parameter to evaluate. I mean the marriage,family, customs,single or not,education and all this oldie historycal stuff like the economist usually said,is keeping hide.