Three related posts, in chronological order (oldest first), here, here and here.
Dan links to a MinnPost report, online here.
Also Dan has one post on healthcare which is worth reading.
I could quote, summarize, or paraphrase. Just read the items. That is best. Ask yourself: If universal public education of all youth were not a social benefit, why do we have it? Why has it evolved in the form it has? Is privatization of education to for-profit firms a sound thought? What are the dangers? What benefits and losses would attach?
UPDATE: For profits are under scrutiny; our friend John Kline, of all things obfuscating; this link.