I am not wishing to be contentious, but the thread on private or state education certainly got people thinking.
But what about private tutors?
There was a (sad I know) Radio 2 programme an age ago about private tutors not being fair in a grammer school area. That children whose parents could afford private tutors have an unfair advantage over those that didn't. Apparently a high percentage of grammer school children were privately tutored before they took their 11+ exam.
Personally I use a private tutor for my DS1 but that is for his SEN, because the state system is so shockingly crap at meeting SEN needs.