> Places like Sweden have school competition via vouchers
This system is also unique in the world and the results since its institution have been woeful. Massive increase in segregation, inflation in grades, bankruptcies where the pupils suddenly doesn't have a school. All because they need to market themselves as "good schools" to make the largest amount of profit.
For the same reasons they tend to establish themselves in places with socioeconomically strong families, since those kids needs less work, and are thus more profitable.
There's also a queue system in-place where the parents must enqueue their child into these "good" schools basically directly after birth. These kind of hidden signals is used to further stratify the pupils through both segregation and class. A government issued report suggested that there should be a draw instead of a queue to prevent these outcomes. This is of course vehemently opposed by the "free-school industry" (yes, ofc they added the "free" prefix).
This system is not something that any country should adopt, and luckily, we're so far unique about it (heard something about Chile (Chicago Boys remember?) but not sure that's still the case). There's a large majority to change this system, but unfortunately the current situation in parliament doesn't allow it.