I agree with patriarchy.
The supporters of GSs are either parents of academic DC or wealthy enough for Plan B to not be the local SM (and they're secondary moderns, not high schools, btw).
Why can't all DC be educated together in intensively streamed schools? Wearing the same uniform, sitting on the same school bus?
I would be more in favour if the government was promising huge funding increases in vocational education as well, but they're not.
This is purely a sop for MC parents so they can pocket that £20k p.a. instead of paying that to private schools.
For the record, I am GS educated ('73-80! 😀) But I saw the educational carnage many SMs caused. With our ever more divided society, the well off and pushy shouldn't be given yet more advantage.
Faith schools? No, they should get no state funding. If you want your child indoctrinated in this way, you should be paying for it.