Especially when you insist that since someone has collected wealth, they must QED want limitless gain, and "must" proceed towards that objective, without any reference to other values or principles.
I'm sure you've earned a dollar or two in your life, so I suppose the simple question is: do you desire the eradication of humanity? If you somehow inherited Elon Musk's wealth tomorrow, would that make you comfortable eradicating the rest of us?
As for what I would do if I inherited Elon Musk's wealth tomorrow: I would do exactly what any ultrawealthy person would do, and use the interest to live and accumulate more interest. I would very much like to engage in philanthropy and speak my views to those who would listen (but having money does not make me a better communicator). I could donate to political parties I align with. But I do not have the same drive for accumulating more assets (indeed, I would actively avoid this), so I would become progressively less wealthy than my ultrawealthy "peers" until I am only wealthy and not ultrawealthy. I would still live extremely comfortably until I die. But unless I can convince the rest of the public to fight back against those few that probably do wish to eradicate/control much of humanity through technology and asset accumulation, nothing will change.
Ford built his cars after the Gilded Age, and after the government imposed a stunning set of policies that began a steady reduction in wealth inequality. Ford was a player in a market where the goals were set in a way that promoted inclusive institutions and democratization.
I was referring to the early events of the industrial revolution in Europe (predominantly England), over 200 years prior. Living standards for the majority of the labor class fell dramatically, because labor itself became less valuable. The scenario above is the extrapolation of this, and therefore much worse.
The technical term for feudalism refers to the system of government in the medieval period. I was referring to that term in an informal sense, since I am sure many know what I mean by that. As I answered to another user, I should have used the phrase "extractive institution" instead, as that is the correct term. "Serfdom" would also have been better.
But it's important to understand why that system of government was replaced. Over the last several hundred years, the majority of humans slowly clawed back power from the elites over a series of economic downturns involving war, revolutions, and then an unstable relationship with the labor class. As labor became valuable again, power shifted back to the people. Reversing that direction would undo all of that hard work. So far, that is what technology has brought.