No one has any solutions.
The solution is to make parenthood high prestige, higher than doctor or lawyer or CEO or rapper or billionaire. Then everyone will want to do it.
A pity that despite a hundred years of marketing we are clueless about how to do that.
There are 'hygiene' actions like getting rid of credentialism, so lowering the perceived-to-be-required investment in each child, and decreasing density (which inversely correlates with number of children independently of other factors, and giving people an optimistic life plan and expectation, and changing marriage/partnering back from being a capstone (something you do once you are established) to being a cornerstone (something you do at the start of adulthood, to build your lives on).
But ultimately it's about the social prestige. Try saying "she's a soccer mom" in tones of awe and respect, out in public, and watch the funny looks you get.
