@godlessbastard
I agree that there are quite a few cases where overpopulation of a species is a problem that can be directly attributed to humans killing off all of that species predators, but if you're sincerely interested in reversing the damage that humans have done, then the proper method would be to reintroduce the predators, not take on their role ourselves.
The thing with hunters that makes them shitty members of foodwebs when they start trying to fill in for an extirpated top predator is that they tend to kill off only the biggest and healthiest members of the prey species (because they make better trophies), whereas natural predators go after the old, the sick, the weak, and the young. Doing the complete opposite of natural selection and culling the strong screws up the population structure of a species, and this has other ecological impacts (like leaving a population more vulnerable to disease, for instance). Or at very best, there's no correlation at all between the animals hunters kill and their relative fitness levels (All a hunter has to do is point a piece of metal and flex their finger, so they'll kill whatever they happen upon, whereas a natural predator has to work a hell of a lot harder for a meal, and the weak are easier to run down than the healthy.), so this still isn't natural selection.
I'm sure there are reasonable situations where governments would want to allow or even encourage hunting, but that's not really what this comic thing is addressing; it's talking about individual hunters and the reasons they give for hunting. The government may want to hire him (or her) as part of a pest control sort of program, but ecological concerns here are from the government (who are probably a lot more informed than the hunter is), not the hunter; his motivation is money from the government.
That's why I say that when a hunter tells you he hunts because of ecological concerns, it's probably a bullshit excuse from him to justify his love of killing for sport. Otherwise, he'd have joined a conservationist society.