Israel and Hungary have managed to increase birth rates by changing cultural norms surrounding childbirth and childbearing.
Hungary? When and what do you claim they did?
Here is a graph of Hungary's fertility rates
Point out where you think pro-natal measures were a success. What cultural change has happened in Hungary that I'm not aware of?
Israel has never had its fertility rate drop below replacement levels. Their "success" is the fact that it's an apartheid state and the Jews are worried about being outpopulated by Arabs. Not to mention the massive economic largess that comes from the US/EU. It works for them but I don't see how you would replicate that in China or anywhere else other than somewhere like South Africa.
Lifestyle norms have some effect but are smaller. You see this in questions of asking women how many children they want to have (lifestyle), they should have (broader norms) and how many children they are likely to have (now money is limited)
I don't understand your point here. Are you arguing that Chinese don't want to have children because they can't afford it, or that they culturally don't want to? Having to pay for private tuition is a cost, not a lifestyle norm.
High taxes don't create malcontent?
Taxing people for not having children won't lead to a colour revolution in China if that's what you're thinking. You're just putting out blanket statements with no knowledge of China or Chinese culture.
China had a one child policy for decades with no "malcontent". Plenty of countries have laws heavily restricting abortion, including some states in your own country.
Some people may be unhappy, but most will just have children to avoid the tax.
Yes but ultimately, that's a small part of China's household budgetary expense. The big one is housing and we've seen in 2H how mildly touching housing risks imploding the entire economy of China.
The main cost would be housing but China's really stuck in a rut here. Obviously, Israel is doing it better than China as well as a few rural US states with high birth rates (Utah and Georgia)
The one thing I would agree with you. You seem to be implying it is only an issue with China and not one with the wider world. Fortunately the advantage of a non-market economy is that the housing market can be requisitioned by the government at any time.