The very high income rank of "Lithuanians", "Latvians", and "Russians" is deceptive. What is really going on is that Jews are being lumped in with others from those countries to not stand out as much as it would if Jews were properly included as a group by ancestry, which they are. The list on that page says "By ancestry" but actually it's by country of origin.
I don't see exactly why someone feels the need to obscure Jewish income. So it's high. Good. They should be proud of it.
I ran into a woman during my commute on the train one day, an ethnic Indian whose parents came from India and moved to Alabama of all places. She was born here and is totally American.
She told me her family earned more than enough to pay for her college, but she got a free ride from some government program entirely because she was a minority woman from the south who wanted to go into engineering.
TBH I would have accepted the money too. I don't blame her. But the program was overtly sexist against men and racist against whites. A poorer and more deserving white man is simply not eligible for such assistance because of his race and gender alone.