Our friends estimate the cost at about $258 billion dollars to end extreme poverty for a year, and point out that this is a small portion of yearly philanthropic spending or [...]
Is that true?
Just ballparking this based on fractions of GDP given to charitable organisations (big overestimate imo), I get global giving at ~500bn/year. So I don’t believe this is true
Sorry, I edited while you posted. I see US as 1.44% * 27tn = ~400bn, which is the vast majority of charitable giving when I add in the rest of the countries Wikipedia lists and interpolate based on location for other biggish economies