Was that sarcasm? Because the reality is exactly opposite to what you say when you look at TFRs of societies having the best welfare - Finland (1.37), Norway (1.48), Germany (1.53), Switzerland (1.46). Even Sweden and Denmark are around (1.66), the same as the US (1.64).
Those countries are not running interventions. They are merely providing aid to those who have children, and not much of it. Even with that, Germany had some success with it.
