> per-capita

Anyone looking at this chart can see the asterisk in it - adjusted by household size

This is not a per capita income chart. It even says it is not in the chart.

More of Generation Z lives at home in their 20s than baby boomers, so the income of their household is higher.

They can't afford a house or even rent, and live with their parents, meaning a richer household, and are said to be richer.

This was discussed (elsewhere) three months ago when this Economist article came out.