Comment by cm2187

Russia I presume is on the list because of geopolitical tensions.

I am not familiar with every country in that list but in my experience, what looks like an anomaly is Morocco, which produces a fairly large elite compared to the size of the country (worked with lots of highly educated / highly paid (and therefore net tax contributing) moroccan nationals). I have hardly worked with any other nationality in that list in my professional life (Bangladesh and Tunisia maybe).