You could do that, but it doesn't achieve the goal that was being discussed.
Spending money on trips is not a "ROI" (return on investment).
Plus, if you spend $5M personally on trips, that will most likely be caught as fraudulent. Because it clearly is. The IRS looks at what charities spend their money on.
Meta: I will try not to engage in these kinds of discussions on HN in the future since people have made it clear they don't want this information.
Academic conferences work this way - are they frauds?