His parents are disillusioned with British State education. They feel that the national curriculum is unchallenging and British children are ill disciplined. They feel that UK educational standards are awful in state schools.
The mother was helping out in the classroom and was disgusted that a (year 1) child who swore at the teacher was not severely punished. Apparently in India that child would had got the cane.
Their plan is that their son will stay with granparents during the holiday. The parents will return to India as soon as the father has job secured in India. Apparently a good boarding prep school costs about 2K, which is a lot cheaper than the local private school.
It does seem cruel to me though. The poor little thing has only ever been to India once.