I just read ST, some parent wrote in saying tuition is
absolutely necessary. Why? Because without tuition, daughter was
last in class. With tuition, voila! became first in class.
Proceeds then to blame the education system for "being unable to
deliver".
Actually, I agree with the last part.
The parent's logic is so convoluted that it proves that the
education system has failed her. 
Being a tutor myself, I can say this much - tuition can
make a difference, but only if the student has the right
kind of mentality. If the kid is really dense and couldn't be
bothered to learn, then even Stephen Hawking cannot do anything to
help the kid.
I resigned from one tuition job precisely because the kid kept
playing the fool while I was trying to teach him. His mom offered
to cut my hours + raise my pay 1.5x to get me to stay.
I demanded 3x pay before I would even consider teaching that
brat. She shut up, and I never heard from her again. 