> Because you can use $10B to give $500M/yr for a limitless period of time. If you can do that in perpetuity, then it actually means you're giving away none of

> Because you can use $10B to give $500M/yr for a limitless period of time. If you can do that in perpetuity, then it actually means you're giving away none of your wealth away. You're selling the time value of money back to the people that generated it for you. You've essentially taken out a giant loan, but the interest is being borne by the people who generated that wealth for you in the first place. And your "charity" amounts to sometimes reimbursing those people for paying the interest.