alt Hacker NewsI'm not talking about people with x+1, where X is a standard US middle-class amount of money. In that case, $20k or $100k or some amount that would make a tiny difference in the world is a huge amount of money to a middle-class family.
No, I'm talking about wealth level X*100. For them, the difference between $100M and $1B is basically no difference in the quality of life to that family. They'd have 1 fewer megayachts. They could give away $900M, and eliminate hunger forever in a large city or a small state. $100B is 100x that again, they could give away $99.9B, still have $100M, and solve poverty in most _countries_.
Or, if they don't want to, we institute a 90% wealth tax on everything over $10M, and solve it ourselves.
What you forget is, none of the x+100 people you are talking about would have ever become a x+100 person if they thought like you suggest they should. In german, we have a proverb: "Von den Reichen lernt man das sparen." (The rich teach you how to save money) And giving away huge sums without personal gain, is the contrary of saving.