The concern productivity of the high IQ nations should actually be the high IQ regions. But besides - is it really that hard for the government to just do a match making enterprise and vocational guidance to get young men into more secure higher earning and providing careers and make sure young women are residing in stable accommodation that can house a family?
In homogeneous Japan, subsidized childcare is a blessing. In hyper-diverse America, subsidized daycare would be reckless endangerment of your child.
The concern productivity of the high IQ nations should actually be the high IQ regions. But besides - is it really that hard for the government to just do a match making enterprise and vocational guidance to get young men into more secure higher earning and providing careers and make sure young women are residing in stable accommodation that can house a family?