For the purposes of the financing behind the voucher system:
£7500 and £10,000 are the estimated costs for state schooled (primary and secondary respectively) children in the UK.
There are an estimated 615,000 students in independent schools.
.: 307,500 in Independent Primary Education, and 307,500 in Secondary Independent Education
The estimated average fee price for Senior Independent schools is £11,750 per annum.
The estimated average fee price for Junior Independent schools is £7,500 per annum.
There are an estimated 15% of the total ~615,000 who are on some form of educational based scholarship (~ 92,250 students)
As such, the maximum estimated cost to the government is £887,906,250
[ 46,125 x 11,750 = 541,968,750 + (46,125 x 7500 =) 345,937,500 = 887,906,250 ]
Likely to be considerably less, due to the weighting of Primary/Secondary school students being different to 50/50 – as students may leave Secondary education at 16, and also the fact that this is based on every student achieving a scholarship achieves a 100% scholarship.
A). The caverns of money this would cost have been totally ignored, and B). how any families below household income £80,000 are elligible. The latter would mean that the government was paying for the wealthy's children to go to independent schools that they could otherwise afford - more wealthy offspring would benefit than the children of lower to middle-income families because they are already more likely to be offered a place in these types of schools than other children.