What an incredibly simplistic analysis! 'Analysis' is too strong of a word; this is mere polemic. It is clearly not the case that government completely corrupts education. It is further untrue that any of the consequences described can be attributed entirely to the fact that government runs public education.
The parent merely asserts that government 'corrupts' education and then lists a bunch of alleged educational maladies. Many of these maladies are clearly due to the fact that schools are institutions and that they serve pluralistic communities. The point about bureaucracy is especially vacuous. Can we even imagine a school or school district, public or private, without imagining an attendant bureaucracy? Another poster mentioned Marx; is it lost on the parent that Marx talks about, iirc, alienation due to private bureaucracies as well as government ones?
The real causes of problems in education will not turn out to be so simple as 'government.' The real problems will turn out to hinge partly on the peculiar aspects of government bureaucracies vs. private bureaucracies for sure, but will also stem from economic issues like poverty and hunger, social and socio-economic issues like the amount of time parents spend away from home working, and cultural issues like the value placed on education and civic responsibility by contemporary culture, and many other possibly irremediable causes.
Finally, the form of the original 'argument' offered is this: There is an overly simple problem, it has an overly simple cause, and the solution is simply to remove that cause. The truth is that both the causes and effects of real-world situations are both more complex and more intractable than that. That any adult should fall for such a blatant oversimplification is perhaps a clearer indicator of the trouble with current corporatist culture than the addled mind of Michael Moore could ever conceive.