Or "man who doesn't need more, doesn't ask for more".
Rich CEOs almost always increase their personal wealth, and make it one of their most important goals, even if they don't admit it publicly.
What Elon has done has signaled that making his companies succeed is his most important goal, and has basically called out other CEOs for not doing the same.
The article gives the example of Ford CEO Mark Fields who got $18.6 million in 2015.
Does he 'need' more?
I'm curious what sort of milestones/requirements Musk would put in place as Chairman if he were to hire another CEO. I would guess this might include some sort of environmental requirements to continue things like Musk's strong dedication to 100% electric (no long-range gas tank).
Tangentially, I think it's disingenuous to say that Elon Musk hasn't had a large amount of input in Tesla Motors, or any other venture he's a part of. Even a cursory glance of his Twitter shows that he clearly has deep knowledge in the automotive/aerospace fields, and further searching shows he was involved heavily in the Roadster design[1], which was a pretty important piece of establishing Tesla Motors as a bonafide manufacturer - both from a "cars people want to buy and drive" and "cars which are pushing the status quo" aspect.