Yeah, the one where freshman physics in college blew threw 2 years of daily honors public school physics in 2 weeks. The one where the high school diploma is nigh worthless in the marketplace. The one where the students have no skin in the game and disrupt the classes and assault the teachers.
It all does not have to be free, just a government funded option to provide a floor. Public school was my only saving grace, being from an immigrant family that did not know English or how to navigate America.
Although, I also do not think government needs to pay for free schooling for 17 years. Can easily cut some fluff and drop that to 15 years, and still give people a solid foundation equivalent to a Bachelors.