First of all, who’s paying for it? Committing to deliver “free” services means that someone (either teachers or others) must donate those services to someone else. The government has no right (and should not be empowered) to take money from taxpayers to provide a “free” education to citizens.
Second, if the current quality of high school education met the levels of 20 years ago we would not have a progressive government. We’re turning out low information voters who can’t read or write.
Third, if a student gets a free ride they attach no value to the education.
Fourth, academic institutions have no incentive to keep tuitions or performance competitive if they can bloat their organizations and get paid to do it. Hence, very expensive educations funded by debt.
Gee, I could go on...
All Hail Big Br’O, your Affirmative Action President.