You’re massively underestimating your ROI, probably by an order of magnitude. $10 billion in charitable contributions per year, even with a very steep discount rate of 20%, would be an ROI of, not 18-fold, but closer to 90-fold (with a net present value of $50 billion). With a more reasonable discount rate of 10% (would have said 5%, but then the Fed happened), you’re talking about 180-fold returns.
Of course, this falls apart under sufficiently short timelines.
You’re massively underestimating your ROI, probably by an order of magnitude. $10 billion in charitable contributions per year, even with a very steep discount rate of 20%, would be an ROI of, not 18-fold, but closer to 90-fold (with a net present value of $50 billion). With a more reasonable discount rate of 10% (would have said 5%, but then the Fed happened), you’re talking about 180-fold returns.
Of course, this falls apart under sufficiently short timelines.