The countries that have the tax incentives can change them. The countries that don't and yet are the worst offenders will need societal change. One thing that would help in at least some societies would be for the Catlick Church to come out of the Middle Ages and join the rest of us in the modern world. The countries that have come to chronically rely on aid should have that aid cut off and replaced with family planning education/strategies/products/medical procedures. Obviously some are tougher nuts to crack than others but nobody is even so much as reaching for the low hanging fruit. In fact the mere mention of it is quite taboo in many circles for some reason.