Nothing misunderstood here. Only someone seriously naïve or disingenuous would arrive at the conclusion that money is the main drive of such people who have already so much that they don't know what to do with it. Especially without proofs, as a "this can only be it!" position.

I'd rather believe wanting power for power's sake than this cartoon idea of an old duck diving into a pool of well-polished coins.

Truth is that beyond a few truly neurotic exceptions, the obscenely rich do use their money. Just not all in supercars and yachts, but also to influence what they can.