I'm sure you have Teresa and I have no doubt there are many children who need help and have parents who cannot afford a private tutor. 

But then you will not hear from the parents looking to get a leg up on all others and do have the money to buy the tutoring so you (nor I) are really not in a position to assess what is the driver of private tutoring. Certainly a large number of media stories and academic studies in Canada and the US point to nervous competitive parents driving private tutoring. Anecdotally, all the kids I saw getting the math help had highly competitive parents (admitting there would be self-selection in my network of connections). Similarly, of the various private programs I am aware of I see a steady flow of Asian children (sorry to stereotype by race but that is the picture seen).