ZPG, un mondo maledetto fatto di bambole

Dystopian population control film with no finesse, just limping across a film's run-time on only 40 minutes of gas. One of the more disappointing things I found in this film is that it really asks no questions. The world government has declared a goal of zero population growth because all the animals and most of the plants are extinct. They claim they can no longer support the human population with the remaining resources. Is that true? No one questions this, that maybe leadership is hoarding those resources for themselves and living large, everyone just agrees that the population is too large and more births would lead to starvation. If so - why do we care about the protagonists and their decision to have a child? In fact, why bring a child into a joyless smog-filled concrete nightmare after you've effectively killed the planet and all other life on it? They don't have an answer, and they had plenty of time to focus on it, making it seem like the decision to "have" a baby was just an act of selfish amusement (and everyone wants in on that amusement).