Edited my comment to remove that bit because it distracts from the point that he is working for reasons other than money. It’s not a 1:1 comparison, but it’s valid and useful to scale big numbers down to ones we’re more familiar with and can reason about intuitively.

How’s this for perspective. Simply sitting on his 2bil invested at a 6% return he’s getting 120mil/year. He does not need that money as a motivator.