Woah the air is thick with BS.
Just because someone is rich doesn't mean they're better smarter hard working or anything more than anyone else. They've just had particular circumstances in their lives. Most societies are not truly meritocratic where the most competent and skilled people would succeed. This is not the determining factor. Education is a great example of this when in many countries not everyone has equal access to education. People do not have equal access to resources or networks or support structures to become entrepreneurs. To start a business or to study or to become whatever they could be.
Eventually People may not be equal or have equal skills and talents and that's fine but everyone should have an equal opportunity.
If anyone could use a history or anthropology lesson, it is you.
What you stated is simply not true, and we have plenty of ethnographical and archeological evidence for that.
You simply repeat ideology of the current times.
Last but not least, your parent speaks of dividing whole countries into classes. I don't know what billionaires have to do with it.
Can you post some of that evidence? How many MRI machines and missions to the moon, did those "egalitarian" civilizations develop?