The idea that we need ever expanding population is a jewish myth.
It's capitalism and exponential profits that require an expanding population. And jews have somehow baked this mindset of a shrinking population as a bad thing. Bad for who? The jews who live on yachts in Monaco really hate having less slaves. Having less slaves makes them weaker.
Ya minus the slaves and ever growing number of slaves it just becomes a different world. For example for pensions to make the math work I think they need to get 6% returns a year. Without growth in the economy it wouldn't be possible to get returns on net for all the pension funds. Assuming a flat economy you could probably get out what you put in. At retirement age instead of the pension being $40,000 or something a year, it might be $8,000 a year.
People think ah, then I would have to save and invest for retirement on my own.. But this won't work either on net for the entire population, because they would face the same issues the pension funds would. On the other hand the saving for retirement part, they could also get out probably what they saved up, just without returns on investments.
For housing where people pay $500,000 for a house, then 15-20 years later the house is worth $1,000,000. That wouldn't happen either, because instead of the land increasing in value, it would be decreasing in value. The house itself, it is a depreciating asset. In 15-20 years their $500,000 house might be worth $250,000.
What still would keep its value or even increase in value.. labor. When your house needs repairs you still need to pay people to do it.