the article says absolutely nothing about immigration or third world countries. whether the paper controls for generational wealth i don't know.
>Why is that surprising?
...it's not to me since i understand we live in a structurally racist society
>Why is that a problem?
...the op asks about "privilege" not whether it's problematic. inherited wealth is most certainly privilege. i was only addressing that. there are many good reasons why privilege of this sort is problematic that i will not rehearse here (many smart people believe estate tax should be 100%; here is the guardian on it https://www.theguardian.com/commentisfree/2017/jul/24/utopia...).