Earlier quoted context omitted.
Define "excess" I'm glad people like Elon Musk and Bill Gates have billions of dollars - they're solving some of the world's hardest challenges right now with their wealth.
With pittances. What is an example of even a $20 billion project by a private party? Elon Musk's current wealth could fund SpaceX for over 350 years. I have a favorite illustration of what just one billion dollars is: a million dollars per week for almost 20 years.
Bill Gates is giving away the vast majority of his wealth
You don't know what Elon Musk will do with his wealth, but given his track record -- probably something good for humanity