Hunger has become far less of a problem in the 21st century than it has ever been before, at any point in human history. And population growth is leveling off - the global population has quadrupled in the last century, but will probably level off about 50% higher than today in the next 50-100 years.

So you're postulating that hunger will get much worse than it is today, without really tremendous population growth, and with significant technological opportunity available in terms of applied computation/robotics and genetic engineering. This seems like an emotional argument, not a scientific one.