Fair point. But this is also the exact problem with allowing a small number of individuals to accrue massive wealth by arbitraging labor costs like this. It doesn't matter how much philanthropy Bill Gates engages in, he doesn't understand the needs of the poor better than they do.
Instead of having this elaborate, inefficient system of funnelling money to first world billionaires and then having them (maybe) send some of it back to the developing world, wouldn't it be better if these workers were just paid better in the first place?
In theory, yes, but at some wage level it wouldn't make sense to choose Kenya over India. At another threshold it wouldn't make sense to choose India over the US.
There is overhead to sending jobs to poor, unstable countries in timezones far from headquarters. If we insist that everyone, worldwide should be paid the same wages we are in the US, what incentive do companies have for not just hiring locally and avoiding those costs? If we step it back and say "okay, you should at least pay what you would in India", then why not just hire in India, which is a far more predictable environment than Kenya?
Instead of having this elaborate, inefficient system of funnelling money to first world billionaires and then having them (maybe) send some of it back to the developing world, wouldn't it be better if these workers were just paid better in the first place?