I didn't say anything about school. This article is about childcare for children below school age. But basic education is also actually quite cheap and easy to provide. Abraham Lincoln was educated in a one room school house. We have made it expensive by turning it into a bureaucratic nightmare with administrators, school boards, lawyers, and PTAs, when all you really need is a few good teachers who are given the authority to set and enforce high standards.

"until very recently" includes pre-industrial times to my understanding when education did not exist in an organized fashion for the poor.

[edit] And in what world is Abraham Lincoln considered "the poor" for his times? I am sure you can come up with some less fortunate people during the same times which didn't really get the experience of that one room schoolhouse.