Earlier quoted context omitted.
Education is guaranteed under article 26 of the Universal Declaration of Human Rights, which the US signed and helped author. Not providing a public option for education would mean redefining what we believe to be fundamental freedoms. How are you going to provide education to the poor without public schools? Will the government give the poor money for education? Will you subsidize the "private" schools with governme…
In reply to your edit: Your entire argument rests on the assumption that private schools that poor students attend will be worse than public schools that poor students attend. You haven't presented any evidence for that, and it is contrary to what a naive analysis would suggest. Today, poor students have absolutely no choice when it comes to schools. They live where they can afford, and they go to the schools they ar…
Now, you would suggest that though free market forces, New Trier's figure of $15,000 could be brought down. But these free market forces are already operating on New Trier! New Trier already has all the characteristics of an elastic good! (1) Many substitutes - families are rich so they can move or send their kids to private school, (2) Low percentage of family income - families are rich, (3) Breadth of definition - there are public and private schools in the area with similar prestige, and (4) Necessity - the kids of rich and educated parents are the least likely to need a degree. To be honest, $15,000 per student is probably a pretty accurate figure for what it takes to give a kid a top notch education. A private system wont lower this figure. The cost of education wont be reduced.
So my claim is that free market forces are already at work. Why then not just convert to a private system if the net effect would be the same? After all, the government is evil and the invisible hand is a force of good and prosperity for the human race. The answer to this question comes from wisty's comment [2]. It is the market failure I refer to several times. The underlying learning will take a back seat to the profit in a private system. Ever notice how some really expensive cloths aren't the ones that look the best? It's because prestige can trump quality. This is inevitable in the private system. It may happen in the public system as well, but the government has the power to try to stop it. No such body exists in the private system to look out for the quality of education.
[1] http://sitemaker.umich.edu/dompierre.356/new_trier_high_scho...