[bayesian_horse]

You don't seem to understand that part of the article.

There are no discrete models for inheriting intelligence and wealth, and making such sweeping claims about this issue is just not warranted.

It has been shown that wealth improves children's intelligence and "success". It has also been shown that intelligence is one factor in success, but not the only one. Even academic success is "only" about 70% dependent on IQ.

Another problem is the difference in backgrounds for such studies among different countries. Sometimes wealth will have a big impact on childhood health (for example developing countries) and sometimes it doesn't (developed nations with proper medical systems, i.e. every one except US).