I think the point is that anyone who gets and keeps that much money is not a good person. A billion dollars is more than any person could ever need for themselves. Consider that having a meager 10 million in the bank at a pitiful 2% return of interest would provide $200,000 per year, which is a very comfortable life. Who can justify keeping 100x that? And how can you justify it when a tiny fraction of that would revolutionize thousands of people’s lives?