All over the developed world, birth rates are declining rapidly and governments are failing to keep us breeding. Since developing countries are becoming increasingly urbanized and developed, they are set to go down the same path. Japan and Germany have been throwing tons of money at parents, but to no avail. It costs about US $125K to raise a child to 15, and no government subsidy can compete with investing that money in the stock market (and a less stressful life).
Kids are no longer needed as farmhands and to look after elderly parents. They take about 10 years to grow a brain, and another 10 years to educate. In addition, with increasing innovation comes increasingly complex jobs. In the future, it will take longer to learn marketable skills, and there will be less blue-collar jobs around due to increased mechanization. This will further marginalize the earning opportunities of youth. So even if kids grow up as indentured servants to corporations and governments, there is no conventional way that they could pay back the cost of their own upbringing + 15 years’ interest + their student loan (at least not until they are ready to retire).
In the long-term future, this is going to result in declining innovation, labor shortages, ponzi-schemes going bust, etc, etc. I’m personally more interested in the future of the human race. Why pass on your genes if it costs you a house? Where is the fun in raising a poop machine into a teenage drama queen? Unless raising children becomes profitable, I predict that the human race will eventually die off and the survivors will revert back to subsistence, where they will once again have an incentive to breed. There is only one way that kids are capable of generating money, and it may become a social norm out of necessity.