A tfr of 1.7, the welfare state will be costly but exist. A tfr of .73 like korea has? Long term, that’s 1 20 year old and 3 45 year olds taking care of half a baby, 7 70 year olds and 10 95 year olds
70 year olds can work, and will have to. Already in many places you have two positively ancient people where one is the caregiver for the other.
People make it work because they have to, but the pressure of taking care of even more will further reduce the desire to get ahead - that has another mouth to feed.
