When I need a reminder that I'm not like most people, I just need to look at how something in human psychology means that being the president / prime minister / dictator's son/brother/wife means that you get your turn as well.

Maybe it really is nothing more than "Oh, I've heard of pepsi, so I'd better buy a fucking ton of blue-labeled sugar water every week of my life", but there might be something else evolutionary about power and loyalty and reward.