Ooof. Just read the document.
My background: state educated in 70s-80s, so did O-levels and non-modular A-levels. Went to Russell Group Uni then Master's then PhD. All were 100% state or charity funded. (Master's was Medical Research Council, PhD was the MRC plus Cancer Research Campaign, now Cancer Research UK)
I wish that today's children had the same opportunities I had. I came from a family unable to pay for extra tutoring, let alone private education.
One paragraph in particular has me very concerned; I'll split it up a bit.
"Shadow education is a contested issue. Its proponents claim that it can help low achievers to keep up with their peers, can further stretch the learning of high achievers, and can increase society?s stock of human capital, thereby contributing to wider economic and social objectives."
And this is bad why? Stretching high achievers means keeping society as a whole 'up there', meaning they fulfil their individual potential. 'Society's stock' sounds like we're mere cattle, though if we can raise the overall standard of education, that surely is for society's benefit as a whole - after all, society needs medics and dentists and vets and nurses and ... So this para seems to be about individual benefit. And if a parent chooses to educate their children via a tutor, isn't that their right in a free society?
"Its critics claim that it adds considerably to existing social and economic inequalities, that it is a mechanism for the already relatively privileged to extend their privilege, and that it may be a financial burden on low-income households.
The critics seem to not like it for communal reasons: one individual different/better than another (so unequal?). Privileged - intellectually or monetarily? Both? Do they not see that if society doesn't have inequalities then we wouldn't have the people to fit in all the necessary (and sometimes unpalatable) jobs to keep it going?
Shadow education may also have a negative backwash on mainstream schooling. The different pedagogic approaches of teachers and tutors can be confusing to pupils, and supplementary tutoring can exert undesirable pressure on young people by making the schooling day very long.
It can, but sometimes that different approach to teaching may be what's needed to get a pupil to 'click' on a subject. My own is notoriously tricky to teach: I advise students to get as many different viewpoints from texts and people as possible, and at some point they find an approach that works. I disagree that this is a bad thing.
Moreover, when teachers receive extra income from private tutoring of their own students, concerns arise about possible corrupting influences and perverse incentives.
This one I suspect is true!
I could go on but I have to go and pick up DS!