> The thing about public goods is that people tend to agree pretty closely about what they are.
Is there some data that shows that?
> The wealthiest person in the world benefits from, e.g. clean air just as much as you do.
We can find public goods in common for many groups, but that's actually a bad example. Wealthy people care about clean air in their neighborhood; pollution is therefore concentrated in poor areas. They don't site the new incerator (or drug treatment facility) on the Upper East Side of Manhatten.
Many needs are specific to poverty. For example, wealthy people are not subject to malaria; they are no illiterate; they don't need toilets or labor rights; they can afford college for their kids regardless of tuition; they have unlimited access to safe, fresh, healthy food. They don't need more available and less expensive health care, so they donate to cancer research and high-tech therapy and not to the medical clinic in the poor neighborhood.
