Agreed. If the population really started to decrease, human society would just change to meet the challenge. We talk about "Universal healthcare", but then we'd

Agreed. If the population really started to decrease, human society would just change to meet the challenge. We talk about "Universal healthcare", but then we'd be talking about "Universal childcare". There is certainly an argument to be made that with more women entering the workforce, and retiring age increasing, that there are less people at home to watch babies. That puts pressure for people to either leave the work force, or delay having children. Government sponsored nannies/childcare would be a natural step to alleviate that economic burden. It's not like the government doesn't already have tax incentives for having children. It would not be a stretch for them to step in in other ways to reward and incentivise parents for creating future tax payers.