A 2021 study by the Census revealed that childless adults age 55 and older had a median net worth of $153,900 compared to $130,400 for biological parents.
Because those dots are countries (with vastly different social and economic structures) not people. The people in the lower-income countries probably don't depend on money in their lives as much as people in richer countries do. Your source also lists other reasons.
Also I'd say go back in time here in the US and you'd see something similar here with farm families, but that makes less sense now when land/housing is expensive and giant expensive machinery (that you probably wouldn't trust anybody else with) does much of the work. That and 100 other factors that make it not work like that.
The person you’re responding to seems singularly determined to ignore the legally-empowered social construct of borders to a point it seems ideological.
Weaker, also if you look at the same source with a graph of 2005-2021 you will see that it's going down faster for below-poverty-level the most (bringing them closer together, 95/70/45 in 2005 to 72/60/46 in 2021). I also don't think it's a coincidence that the peak of this graph (before it starts falling for all-but-the-richest) is in 2008.
But also I think this data would probably look different if people living in multi-generational households (or otherwise having family who provide free childcare) was taken into account (which is to say that people aware they have no support will be more reluctant to have kids). On a different note, income alone is leaving out other important factors like the cost-of-living/housing in their area.
This is copy paste from your replies elsewhere in the thread. F-off with your purposefully misleading comment. That just says more developed countries have less kids, which we know. That has nothing to do with internal trends.
This was actually the first comment I made and then copy pasted to the other one as it applies to both. Regardless, the internal trends are the same. Here's a source for USA. Sorry if that doesn't fit your worldview.