To do the above is a bit wtf to me. I work hard to earn money and pay for food, space, shelter. I could easily raise a two child family but I cant because some "god" has decreed that to do so would be a crime against humanity.
Thing is though, how far will your (Not you personally, but anyone currently "comfy" in their earnings) well paid job get you when it really comes to the crunch. Will it keep up with the rising costs of everything, or are you hoping that nature sorts the problem before you are caught out by the rising costs. Assuming things do go the way of nature sorting things out through famine and disease, the people most secure in their future probably won't be the people currently in well paid jobs, but rather, the producers of said resources.
I think the bible has it right regarding the four horsemen, said "natural" solution will probably be war, famine and pestilence, not sure about what "death" would be. To me if it comes to the crunch, billions suffering and dying through war, disease and famine, is far worse than just saying "every one person can have 1 child" (Eg a couple = 2 children) to limit population to current levels, especially if said method could avoid those billions dying. This is all hypothetical of course as you'd never get a true global consensus on the topic.