On what basis are those who are saying yes, saying yes?
Of course they shouldn't. It's insane.
To say yes presumes that you only pay tax into the education system for the 12 years of your working life during which you have children at school. It presumes that the only possible reason to pay tax into education is for your own children and your own children's schools. This is such an insane, wrongheaded idea that I don't know where to start.
Should people who had no children get a 'rebate' as well? Should people whose children are now adults and no longer using the school system get a 'rebate'? Should people who have been healthy all their lives get a 'rebate' on their NHS contributions? Should those who never use libraries get a 'rebate' on the tax which goes towards those?
Funding education benefits all of us. If you never use the state system for your own children, you haven't 'never used' it. You may, at some point in your life, want an accountant, a lawyer, a librarian, an actuary, an architect, a tutor... 93% of whom will have got to the university where they qualified thanks to progressing through the state school system. You will almost certainly need a plumber, a roofer or a joiner, and they will know how to add up, measure and do basic invoices thanks to doing maths at school - and, these days, they will more than likely have done some kind of post-16 qualification at a state FE college.
To even suggest the idea of a 'rebate' for people with children at private school betrays such a narrow-minded, self-centred view of the world, a fundamental misunderstanding of what the tax system is for, and an excruciating lack of understanding of how it works.