And where would you get teachers from? If the lessons are to be subsidized, then we would need the common taxpayers' consent too, which is... problematic, simply, in all senses.
And if we are to hire volunteering teachers, I strongly advise against the idea. Teaching is an honorable profession, I want to see it rewarded in material -atleast, on this scale- to make an example of it and to show our gratitude for teachers. The job must not be taken lightly.