> in real terms average hourly earnings peaked more than 45 years ago: The $4.03-an-hour rate recorded in January 1973 had the same purchasing power that $23.68 would today. (https://www.pewresearch.org/short-reads/2018/08/07/for-most-...)

Now what about the change in the number of earners per household? Houses don't earn wages, people do.

Ok, but, what about median household size? Shouldn't we calculate the "richness" based not on how much each household makes but how much each member of a household gets from it? My guess is that households are smaller these days, but don't know.