If I am not greatly mistaken, median household net income at PPP after tax, transfers, and health care costs is considerably higher in Canada than in the US.

Good point: that figure does not include social transfers from the government, and in some countries, that's not insignificant. Though it's not insignificant in the US either...

I found this: Gross household disposable income per capita (including social transfers in kind):
en.wikipedia.org - Disposable household and per capita income

This seems to include transfers including health care, but the US still comes in at #1 at $67,438 PPP and Canada comes in #13 at $47,737 PPP.

Now, those income numbers are averages and not median, so I'd expect the median numbers to be closer to each other for those two countries since the income spread is much larger in the US. But how much closer?

Surprisingly, according to the friendly neighborhood LLM, social transfers in kind per capita in the US are actually higher than Canada's, $9K-$12K vs. $7K-9K; an unexpected result attributed to Canada's lower healthcare costs requiring less transfers/support to cover spending. If that's true though, it suggests the US may still be in the lead.

(Not that it matters - the point wasn't to claim the US is better than Canada, but rather that capitalism can hardly be broken in a country that continues to lead in virtually every conceivable income/wealth of the average joe metric against almost 200 other countries; a country that (until recently anyway) led the world in highest net immigration every year for the last 35+ years.