"Even Upper-East-Side Manhattan, one of the wealthiest zip codes in the U.S., has average incomes "only" in the high 5 figures." I'm not sure that you can look

"Even Upper-East-Side Manhattan, one of the wealthiest zip codes in the U.S., has average incomes "only" in the high 5 figures." I'm not sure that you can look at simply average income without knowing whether the people are single, cohabitating and if they have children and how many. Also average income I would imagine doesn't take into account healthcare costs which can run thousands. One person may be covered, another not covered, another on medicare etc. Some may have child support to pay. Saying that someone can get by on "less than 150k" is like saying that someone can build an ecommerce website for $X.