1. Financial and career success are correlated with good test skills.
2. Good test skills are strongly influenced by genetics or early childhood.
If you agree with both then you expect some correlation between wealth and test performance.
It's mostly privilege. And just being born in America is one of the biggest privileges wrt career and wealth.
From your conclusion you’re telling me wealth is completely random or the capabilities of children is completely random. Neither of those holds up to any scrutiny.
I don’t know what being born in the US has to do with the conversation.