We already know within the US that it doesn’t work though - the poorest with the worst diets (not on subsistence farming here, key point) have the most unplanne

We already know within the US that it doesn’t work though - the poorest with the worst diets (not on subsistence farming here, key point) have the most unplanned pregnancies which lead to lack of economic advancement in our current incentive structure. The Gates Foundation is funding more education which tends to lead toward women and men setting career goals, potentially relocating, and thereby delaying childbearing to a later time. The primary exceptions here in developed countries are pretty much entirely religious (see: Duggars, most of Utah...). Commercially produced fast food is also more expensive than cooking at home in developing countries because their marginal utility of labor is so low (much cheaper to cook at home and spend the time than to go work those hours instead). Government subsidies to make fast food nearly free don’t work that well when much of the population has no access to it either. This situation is somewhat inverted from America’s problem (healthier city dwellers that walk with fewer children, unhealthy rural population dependent upon cars that reproduce far more).