> For many IQ tests there is a correlation between wealth and high IQ results [...] As a result if you have more, and better education and schooling, you more more likely to have a higher IQ.

But the causal link between parents' income and kid's academic success is small to non-existent[1] so even if there are factors influencing IQ, wealth doesn't seem to be one, at least not in this way.

[1] "Low Family Income Not a Major Reason For Poor Student Achievement" http://educationnext.org/low-family-income-not-a-major-reaso...