I never stop to be surprised. People who already living on the limits of what they can afford, either finds a lady who have kids from before, or make a couple of themselves if not have, and some do both.
I have said many times before, Me and my wife can easily live on 20k a month if only us two, and have a decent good life with food, and everything we need, except insurance, travel and other activities that cost money. It is a good sustainable life if we had to do, but no extra, like repairs, new glasses, etc.
Family of 5 now who eat with us, and we help one adoptive daughter, basic costs not so much more + dogs.