Those new people being born will end up funding your state pention. Unless your fine not having one
I get it, I just also understand humans are destroying our only environment. Were driving the fifth ever mass extinction of life on Earth.
We literally can’t keep living the way we are.
Not to put words in your mouth, but do you really think the best reason to have a child is for the good of the economy?
Individuals have a perverse relationship to the economy where what’s good for the individual diverges from what is good for the economy. For example saving money is good but if everyone does it then you can end up with deflation like Japan.
In terms of children people do it due to biological urges without fully assessing the hit to quality of life or finances. The economy needs more workers at every point though since pensions are essentially a ponzi scheme.