His sums just don't add up. He is working on the assumption that all parents who send their children to private school can afford a 20% hike in fees. We can't so here's what will happen:
Based on two children at £12,000 pa, Corbyn would be collecting £4,800 in tax. We can't afford that so our children move to state education (if there's a space) at a cost to the government at £4,000 per child. So the cost to the government for my children leaving private school is £12,800 per annum (being the loss in VAT and cost of state school place).
But I have an extra £24,000 per annum in my pocket (which is already net of tax so they can't tax further) which I can spend on moving to an area with "the best" schools, therefore taking away places from children who would previously have got in. I can also afford tutoring in abundance and a wealth of extra curricular activities, wonderful holidays and experiences so my little precious children can have the best in life.
There really are no winners. My children get pulled out of the right school for them, classrooms get fuller having a huge impact on all, arguably those best performing schools get even better results and the social divide gets bigger still.
Until the existing issues with funding in the state sector are addressed then this policy can never work.
He is working on the assumption that the decision to go private is based purely on snob value. Just goes to show how out of touch he really is with the world. How can he justify a policy that leaves me £24,000 better off but the government £12,800 worse off???? Bonkers.