Spacex employs over 6000 people, they may not think musk is wasting his money. If Bezoz does the same?IAfter a certain point it becomes about getting a high score.
Like Bezos who literally couldn't think of anything to do with his vast, uncountable fortune (hint, kojak. how's about paying your workers properly) so decided "I'll start a private space agency"
None of us have a clue how we would react to that much wealth, we can only make a guess, I also guess most of us have more than we need and give away less than we could afford to.