Indeed, it's not that the conclusion of the article is wrong; the top 1% (whether measured by wealth or by income) are actually a pretty diverse group of people

Indeed, it's not that the conclusion of the article is wrong; the top 1% (whether measured by wealth or by income) are actually a pretty diverse group of people (in terms of occupations). However, the top 0.1% or even 0.01% are possibly a much more monolithic group, perhaps largely involved in the financial services and banking industries? This may be the more relevant group to discuss.