Here's what would have to really scare you, if I'm gauging your views correctly: Zuckerberg actually believes in what he's doing and based on his behavior the last 14 years he isn't very interested in the money.
He has never acted like a Saudi prince or gilded age tycoon. He never hoarded Facebook equity, he took vast perpetual dilution (despite entirely controlling the Facebook corporation), and produced thousands of millionaires. He spread the wealth around, that's why he only owns ~14% of a company that went public less than six years ago. Larry Ellison by contrast, still owns 27% of Oracle after 40 years.
How about all of those millionaires that got rich on Facebook stock? All those teacher pensions that got massive returns on it? The thousands of Facebook employees that have yielded 1%er salaries and wealth. The tens of thousands of average investors that rode the Facebook giant and made most of the money on it.
Zuckerberg made a lot of money. Everybody else combined made more by a factor of ~8x or more. What's their guilt in having profited on all of this?
Hitting someone with the wealth seeker tag, is the easy way out. The easiest, cheapest negative label there is: the profit motive. Unfortunately for your premise, criticizing him about money, makes very little sense.