A more interesting investigation would be the correlation between job aptitude and wealth. Using IQ as a proxy for 'smartness' in all jobs and industries seems

A more interesting investigation would be the correlation between job aptitude and wealth. Using IQ as a proxy for 'smartness' in all jobs and industries seems cherry-picked to make a specific point. IQ tests ignore things like emotional intelligence and social intelligence, which are vital for managerial/political roles but less so for a PhD in Physics.