Tom MacIntyre writes:

What about % of income above the level to comfortably sustain an
individual/family? Someone earning $50k a year giving 6% is digging
deeper than someone earning $500k giving 6%, at least potentially.

If you play with figures long enough, you can make Bill Gates look
stingy no matter how much money he gives away. But he is still giving
away billions of dollars, and he only has $50 billion to play with.

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