I agree, and would add free tubal ligations, too. I chose that after one child, as the best way to to keep from having side effects, accidents, and another child.
Here in the USA we have equal rights and job/driving opportunities and aren't forced to wear junk like burkas. Not in places with billions of people though. Education, work besides housework, driving a vehicle, and what we can wear are restricted in half the world. The half that is ruining the environment with extreme overpopulation, for the most part.
Still, in countries like the USA that allow over-immigration from cultures that still over-breed, they do so even worse when they get here, then Americanize/Europeanize in their consumption, and pollute more than the third world countries they came from. Virtually all the growth in the USA and Europe, and Canada, is from this, when their populations and thus consumption and pollution would have gone down. But that would have cut the profits from the corporations that provide political funds.
The overpopulated third world desperately want to escape their own over-crowding and lack of employment caused by over-breeding. Some wish to conquer through the simple expedient of over-reproduction in the host democratic countries. Get the majority and you get the power to steal, to turn the countries into a caliphate, or communistic state.
So stopping them will cause conflict. They don't want less children, but more to conquer the stupid gringos or stupid infidels. They don't care about pollution or depletion. They don't really care about AGW and the methane self release tipping point. Their women are brain washed or totally subjugated, so would chose what their men want, or their culture, or god, or allah. They would not chose for themselves or with thought to future generations' survival.
Research from Murtaugh and Schlax at Oregon State University shows that a hypothetical American woman who switches to a more fuel-efficient car, drives less, recycles, installs more efficient light bulbs, and replaces her refrigerator and windows with energy-saving models, would increase her carbon legacy by 40 times if she has two children.