Russia's oligarchs got their wealth by taking over previously state-owned companies using very shady tactics like bribes, extortion, violence, while the US businessmen generally created their own wealth by creating something new
https://en.wikipedia.org/wiki/Shock_therapy_(economics)
https://www.thenation.com/article/harvard-boys-do-russia/
Remember this Times cover? http://content.time.com/time/covers/0,16641,19960715,00.html
What's wrong? :)