What do you mean? I see no success so far across the world, and simply paying people to have kids is the wrong incentive (since badly raised children are worse than no children).
> paying people to have kids is the wrong incentive
I absolutely agree. Childcare is horribly expensive and just easing the burden of that would make parenting far more palatable to those who would otherwise be good parents.
My point is that this is a problem that can be solved, the only thing stopping us is us.
As this thread happening in a post about machinations by the current regime, the likelihood of it being solved (let alone correctly) borders on near impossible. The only thing that they'll do that will affect this is take away reproductive rights and that will lead to more unplanned births.
The documentary Idiocracy has some interesting insights into the issue -- it's worth the watch.