Unfortunately 40k per person isn't likely to get the attention of the someone trying to maximize the amount of good done per dollar (those of us who follow GiveWell) when the money would go further with the charities they currently recommend. The "exotic underclass" has the "advantage" if you can call it that of benefiting a lot from small amounts of money per person, so you can help more people.

We need different arguments for why we should help people closer to us. One reason might be that it's less abstract than people in a different country that you'll never meet, but I think that argument needs to be developed.