People really believe this thinly veiled eugenics argument?
There is plenty of resources to support humanity. The issue is solely in our societal structures and our distribution of those resources causing almost half of everything we produce to become waste because it profit couldn't be extracted from it.
We could cut most of our production, reducing our environmental harm, redesign our cities so they are not sprawling wastelands of parking lots and empty lawns, and there would be plenty enough to go around. That's real long term planning we need to have.