Starting conditions (where one was born, levels of wealth and opportunity there, one's parents' education and jobs) are shockingly predictive about an individual's future. Hard work leading to social mobility has always been the exception, not the rule. Most will not beat the odds since if they did, those wouldn't BE the odds. A lot of us are just so deluded by survivorship bias borne of listening only to success sto…
This isn't to say that starting position doesn't matter, I'm sure most of the vanderbuilts are still doing reasonably well.
When interest rates and returns on labor are low it becomes difficult to get ahead by either working smart or hard for the majority of individuals.
Even in the tech sector, the most lucrative approach is to simply work with a dominant firm. Founders/Employees give up too much equity and have too little cash flow to compete.
Taken to the extreme this economy looks more like a feudal economy of court jesters, peasants, and lords then the proto-industrial economies Adam Smith wrote about.