I doesn’t work either. Appeals to nationalism, religion, and even straight up paying and providing luxury benefits to people, in order to have them start having more kids just did nothing in the long run. The world is different. Your children are more likely to become independent adults when you put your resources into a smaller number of children. The cost/benefits ratio of having large families to produce stability, and increase the chances at least one child will be successful, has completely reverse from 100+ years ago.