Can't save those who aren't willing to be saved. Those starving people you talk about, they're being oppressed by warlords and drug kingpins who 9 out of 10 times intercept the relief shipments. They would a lot less likely to be starving if the aforementioned thugs were out of the picture. Logically, it would fall to some country or organization to annihilate said thugs. Hmm, I wonder who would be the first to do that...oh, wait, that's unlawful interference in the affairs of another nation...
Hell, I'd drop a nuke on the UN if I thought it would stop the self-important, over bearing, power hungry nit wit politicians from gumming up the works with they're petty self-serving bull****, but it wouldn't cause there's several million willing and able to take they're place.