The oddest thing about this article is that they never quote the old line about "power corrupts, absolute power corrupts absolutely." Though their research does point to that being true. Fairly short article. There are comments on the site -- and links to other interesting articles.
Find it here: https://www.washingtonpost.com/news/speaking-of-science/wp/2018/08/13/are-rich-people-more-likely-to-lie-cheat-steal-science-explains-the-world-of-manafort-and-gates/?noredirect=on&utm_term=.3419bafc070f