The latest excuse I've heard is that if you end poverty/hunger, we'll end up even more overpopulated, leading to more CO2 emissions and warming, killing off the earth much quicker.
Isn't such an excuse, when boiled down, is the same as if you were lost in the desert dying from thirst, stumbling upon a well, but the owner refusing to even give you a sip (or barely a sip or two if they're a generous owner) because they're afraid the well might run out some day?
What's built on injustice and inhumanity, even with good intentions, even “for the future”, will always be and remain unjust and inhumane, and will always be riddled with evil no matter the intentions. The end does not justify the means. The means now are especially horrible, and nothing can justify the condition humanity is in right now.
How can you even justify putting the survival of the human race above humanity itself? I, as a human, don't want to “survive” in a world without humanity. I don't want my “future generations” to “survive” in it either.
“To be wealthy and honored in an unjust society is a disgrace.” Confucius, The Analects