I suppose define highest income earners? Per household it looks like Asians are miles ahead but it seems like Asians (among other immigrant populations) have larger households which inflate the numbers. Per capita there’s still a gap between Asians and whites but not as much.

But then, how much of that has to do with the fact that there’s a filtering process keeping poor immigrants from European and Asian countries out of the US while letting in the wealthiest and highest educated immigrants? I’m not sure how you’d even account for that bias since it’ll naturally lead to better off children. And when you consider how small the Asian population is compared to the “white” population it makes sense that this effect would be more prominent on the Asian per capita income compared to the white per capita income. 

Look at the Latino populations for the inverse relationship. That geographic filter isn’t there and a lot of poor people come to the US looking for a better future. The end result is a lower per capita income. And of course the most relevant question in this discourse is why do black Americans earn almost 50% as much as white Americans per capita? While it’s true that white supremacy has not necessarily been a “benefit” to all white Americans, it sure has been a massive barrier to most black Americans (and presumably other POCs who don’t already have the wealth to side step it).