He was the one who partnered with Microsoft and turned it from a non-profit to a for-profit company.
In the world where Sam Altman leads OpenAI to market dominance and eventual acquisition by Microsoft for $400B or whatever, he obviously would represent an important part of what Microsoft would be buying and would be compensated accordingly.
It is the reason why CEOs (not Sam, apparently) are usually compensated in stock options. Golden parachutes are some sort of severance when the CEO gets fired immediately from the new company, eg. Twitter.
He's totally the guy who made OpenAI into ClosedAI, but money was clearly not his motivation.
If money was his motivation, why wouldn't he spend his time building a company like that in the first place? As the head of YC, I don't think he would've had any trouble raising for anything, even prior to OpenAI.
Also, it's not really parent's "point" as you claim; they quite explicitly talk about compensation in case of acquisition.