Tax the fucking rich. People aren't having kids for two reasons: education and lack of money. Oh, make it 3 (as said in the article): no future.
The baby bonuses are hilariously low! Some of them are just 2-3k€ as a one time payment for having a kid. Kids can cost 100k€ until they leave the house. How is a one time payment going to finance that? And subsidised childcare, while nice, ain't going to pay for an apartment or house big enough to have the kids. Parental leave is also just a weeks or months tops. Those are just alibi measures to say "we did something", while not addressing shit.
And of course, stop poisoning the entire damn planet and vote for parties that don't want that. Who wants to bring a child on a dying planet? Tax the rich and invest in people, not corporations.