I think it's a lot to do with John Steinbeck's idea about people considering themselves 'temporarily embarrassed millionaires' - they want to side with the powerful, because maybe they'll get the power too, maybe then they'll be let in the club when its 'their turn' after all their hard work. They don't want to associate themselves with people they've been told are lazy, not working hard enough, not striving. They've swallowed the line that the wealthy are better, work harder, they deserve it and you might get it too if you 'work harder'