Education Secretary Gillian Keegan said some cost the same as a family holiday abroad.
The prime minister told MPs that giving them charitable status is "about supporting aspiration".
The Tory-backing paper has accused the Labour leader of "class war" by wanting to make private schools pay VAT.
Now the cracks in our education system have been so publicly exposed, we can't continue to ignore them, Diyora Shadijanova writes.
Very swift analysis.
PM told education cuts breach election pledge.
Lack Of Working Class Actors Shows Privilege Is More Important Than Talent, Warns Labour's Gloria De Piero
Labour is holding an investigation into access to the arts
Adventurer says schools only celebrate sporty, clever or good-looking students.
Councils perform criminal record checks on staff and manage asbestos in classrooms.