What’s the problem? We’re committed to destroying livable human habitat for 100M’s to 1B’s of people via global warming.
That’ll be less painful if there are fewer people. Lower populations should lead to lower emissions growth too.
Who's 'we' in this context? USA? China? Developing nations?
most retirement systems assume at least stable population growth. if the system can't sustain itself, debt borrowing can be done but eventually creditors will come calling.
what it means in practical terms is the destruction of the modern social safety net. some declining birth rates are ok but places like Japan, Spain, and South Korea look disastrous.
There's a significant risk it will lead to a large reduction in living standards. A lot of things like retirement funds are built with the assumption of infinite growth. This assumption will obviously break one day and when it does I don't see how it could go smoothly.
On the plus side, it will likely lead to lower emissions, assuming it doesn't lead to massive wars or other destructive behaviors due to the instability it will bring.