Yeah those parents are all upper middle class. None of them are at all comparable to the owners of a company like VW, Tesla, or Amazon.

And none of them were "heirs who own the majority of stock" nor support your claim that "just because the companies change doesn't mean the owners do".

Edit to reply: You don't need to tell me about the social mobility of people living in poverty. I was born into a family of construction workers, and escaped poverty by learning to program. I know from experience that new businesses create opportunities to escape poverty, even if that isn't measured or sufficiently weighted by the index you cited.