it's because I don't think that is the main factor at work here.

People will take the best affordable education option available. For some that will be to pay for it (as it is now). For some it will be free public education. What I am saying is that, like any service, if you aren't satisfied with what you are getting people will look elsewhere. And they will have more and more options to public education as time moves on. Quality homeschooling, charters, whatever it may be, there will be options. And one of the others I mentioned - a quasi gov't/private hybrid. Public education needs both an infusion of money and technology.

Someone will come up with the bright idea that teachers teach. That their art and their contribution to society is best served putting them in the right sized classroom and giving them the right tools to succeed, and removing the BS. If the public system will not do that, a private one will.

Public education over the next 20 years will undergo radical transformation. Or it will fail. And some of those transformations required will go against the grain of the principle of what we know today as "public education".

RandySF had a very interesting post on pulling his child from a public school. I believe it was for bullying but I cannot remember exactly. I'll try to search and add it here.

That delusional poster you reference is me. And it happens today all across the country.