It is not intuitive at all to me. From the article, I can see that there's some sort of penalty by having more billionaires in the country, and that somehow leads to "the time needed to earn $1 is 63 minutes in the US", which doesn't really line up with the fact that minimum wage per hour ranges from $7-$18 depending on the state.
The "old" way was to measure median net PPP per capita, which makes more sense to me:
https://upload.wikimedia.org/wikipedia/commons/8/85/Annual_m...