> This means all of your welfare programs and retirement programs will not have enough people in the younger generation to pay into them and support them.
So step 1 for sustainability: remove said programs, as the alternative is either A) acknowledging they are just a pyramidal scheme or B) removing individual freedoms and forcing people to have children they don't want to have, just to support the programs you want to have.
Step 3, don't enforce your borders or immigration laws and bring in a "replacement" population.
You're right, they are pyramid schemes. Which is why I think it's dangerous to put important programs like this in the government's hands and make your population reliant on them.
So step 1 for sustainability: remove said programs, as the alternative is either A) acknowledging they are just a pyramidal scheme or B) removing individual freedoms and forcing people to have children they don't want to have, just to support the programs you want to have.