I'm normally a proponent of reducing income inequality. But this has got me thinking. Is the world actively better off when billionaires like Cook/Gates/Buffett make a ton of money.
Consider the alternative: someone in the 75th percentile of USA income gets a fat raise. Most of this money is spent on a nicer house, a nicer car, eating out, going on vacation, etc. Contrast this against a billionaire who has signed the giving pledge. They spend a small fraction of this money on themselves. And the majority ends up going to charitable causes such as educational initiatives, HIV research, deworming, clean drinking water, etc.
Ironically, big payouts (and tax breaks) for billionaires* would do more to help the needy, compared to raises for the upper-middle-class.
*This only applies to those billionaires who have committed to donating most of their wealth of course