Ok, it sounds extreme. It also sounds like more of a thought experiment than anything else. The obvious reaction is to cast stones. The more interesting discussion involves performing the thought experiment yourself. What methods do you think would be necessary to control a runaway population count? Is it somehow more ethical to let some of the population starve to death for lack of food? Seriously, if you had to find a solution to the problem, what methods would you employ? Or don't - it's far easier to spin something like this for the sake of partisan rhetoric.
I'd love to see where this ends up. I'd imagine that in the extreme case, you'd end up with something similar - something forced.