> Hyper-capitalist societies need some counterbalance with social safety programs, e.g., as seen in the Nordic states and the blue states in the U.S., otherwise people choose not to reproduce if their children won't get anything out of society like they did.

Total fertility rates in Scandinavian countries (known for their very generous welfare) are falling as well -- not as catastrophic as South Korea's, but way below replacement rate nonetheless. E.g., Denmark's total fertility rate fell yet again in 2024 to 1.466. (Source: https://www.dst.dk/da/Statistik/emner/borgere/befolkning/fer...)