There is a correlation between intelligent and income but we have been conditioned to misunderstand what intelligence is. we are taught that schooling is as sign of intelligence but that is just a sign of Memory and a sign of formatting. Many people fail because their ideas as are not formatted correctly or their ability to remember remember during an exam. There are many people who have failed education and still succeed in their dreams. Elon Musk is an example where he said "I didn't go to Harvard but all my lawyers did".Is Musk more intelligent that his lawyers even though he does not have the same education. So what is intelligence? The issues is also how do you measure success. May people choose Money as that quantifies things and then we can compare. The main issue is Quality is not comparable. Neither is Happiness. Success can only be measured with yourself. because you have to do the things that need doing to get into the positions to be seen as dumb. The Politician who says some really dumb thing or the businessman that does not seem to know what he is doing, have done some really smart things to be in a position to be dumb.