Would you have an issue if that someone subsequently refused to part with 0.001% of their thankyou notes in order to save someone else's life?
This is a terrible analogy because it captures the good reason why there are billionaires (we reward them for building something useful) and none of the problems that come with it (wealth and power inequality, economic externalities, etc.)
This is a terrible analogy because it captures the good reason why there are billionaires (we reward them for building something useful) and none of the problems that come with it (wealth and power inequality, economic externalities, etc.)