I don't think anyone is under the illusion that education is free. However, it benefits society as a whole, and not everyone may be able to afford it. So, it is often in the interest of society to make good tuition affordable, regardless the background of a student.
Of course, it is also beneficial for the student. But for that we have the tax man :).
Yes, taxes pay for education for all. Considering that a large part comes from taxes on income, which means the rich pay more than the poor. Damned socialists, giving the same education opportunities for everyone!
(Well, unfortunately it's more and more the middle class that pays due to tax evasion and fiscal advantages to the rich)
Someone pays for it.
It's a minor but important point. Lets not kid ourselves here.