Then the solution is still to make those that actually want to able to. This is anecdotal, but I know several people that delay or do not get children due to their finances. That is in Norway, with the best or close to the best support and security net for families. Society is not made to have children, and if you dare go above two children, then you will have a lot of disadvantages. So the practical maximum for most people is two, unless you live where there is almost no jobs, on top of that not everyone gets children. The practical maximum is due to car size, home size, budgets etc. Do you want your child to own a home some day? Then you have to pretty much make sure they are able to financially and start straight away, which is not something they will be able to themselves. All these reasons contribute to there being born less than two children per woman.
Society has a few choices to maintain the population
- Make it a lot easier to have children and give them the best possible life. Make it an obvious choice. Free childcare, free healthcare, parental leave, financial support, etc.
- Force, direct or indirect (economical, loss of rights, anti abortion, etc)
- Immigration