I think the specific form of "charter schools" we have are mainly a US invention, but a lot of countries (like the Netherlands, where it's more common than not) actually just let students use public funds to go to private schools, which would melt the heads of most people who oppose charter schools because it's "right wing".

Charter schools are I think a direct response to figuring out how to fix low performing, big school districts in the US. So while I have no idea if private or public schools do better in the Netherlands, I think we'd need to find something more like the Baltimore public school system in another country to make the right comparison.

> A commonly given alternative explanation is that the public options in the US are deliberately sabotaged via budget restrictions, and then the resulting poor performance is used to justify further cuts

I find this hard to address because it's not really a matter of policy but of ulterior motives or conspiracy. I personally have no secret plan to make public education even worse by posting about charter schools on hacker news. To me it's just about giving students the option to get educated by an independent institution rather than be forced to attend some of the worst public school systems in the country.