@machiavelli "Humans are intrinsically flawed, and hence anything, any system, any civilization, any idea etc that involves humans will also be intrinsically flawed."
- speak for yourself :P, but seriously, humans are flawed by what measure?
If you are able to define some 'perfect human' then sure no humans live up to that. However i think that such a thing exists only in the same way as good/evil exist, as conceptual object created by our minds.
What i'm trying to say is, you are making up flaws for humans.
I think humans are by their very nature flexible automatons reacting to their environment (and altering it) - we can create a system which promotes cooperative human behaviour, but humans are designed to find the best solution/action to any problem, so will naturally seek any loopholes in whatever system we create.
I don't see this behaviour as flawed, we did not evolve in system which we created ourselves, we evolved in a system which was largely beyond our control. Nature itself. Thus our behaviour is the best we have to increase survival chances in Nature.
@Volunteer teachers.
Everyone can volunteer, is every working adult gave up 4 hours per week to teaching 'something' the rest of their hours could be used to feed their children. The concept of a civic duty could be employed, along with a requirement for citizenship to include the duty of being a citizen... I don't see that this kind of system is either unworkable nor is it likely to be damaging to society.