Marx mistakenly thought that Capitalism would increase profits by exploiting workers and cutting wages but it turned out that in order to make profits you need to sell your stuff and America found out that after the war with all the extra ability to mass produce goods that they in fact had a ready market in the very workers themselves, so to sell their stuff it was a better idea to pay the workers more money so they could buy stuff. That is why America is doing rather well with happy workers buying iPhones and Russia is going down the tubes.