I am not much of a cheerleader for public education in its current form in the U.S., but surely a case can be made that it is society's job to educate people -- because it is in society's best interest that people be educated.

And if society determines that one effective way to ensure that all people, even those of limited means, have an opportunity to receive an education, is to devote public dollars toward the effort, I see no reason why we can't say that, by proxy, it is the government's job to educate people.

(Personally, though, I would like to see the government's role as being primarily the benefactor and not the administrator or provider of education.)

As an aside, adding the words "full stop" to a statement may communicate extra intensity, but it doesn't excuse you from having to provide evidence to back up what you say.