A lot of the people who want to have children simply cannot - they have done the math and it’s a wildly financially irresponsible path.

Wages are too low

Both parents need to work just to survive

Homes are too expensive

Food is too expensive

Clothing is too expensive

Post-secondary education has become a scam

One serious sickness and - in America, at least - you are bankrupt for decades

The list goes on and on.

The number of childless couples will go up as the need for children decreases - this is obvious from places like Norway and Finland - but a focus on strong nuclear families with little to no financial stresses arising out of having children will encourage most who do want them to actually try to have them.