This underestimates the potential donations from people who don’t have high net worth. Wealth is largely a function of what percentage of income you put into savings, which is much higher for wealthier people. But you can donate out of your income, not just out of your savings. At the same time, if you’re not saving much money then you might not have much wiggle room in your budget to donate more, so this maybe isn’t a huge consideration.
This underestimates the potential donations from people who don’t have high net worth. Wealth is largely a function of what percentage of income you put into savings, which is much higher for wealthier people. But you can donate out of your income, not just out of your savings. At the same time, if you’re not saving much money then you might not have much wiggle room in your budget to donate more, so this maybe isn’t a huge consideration.