Most principals prefer that there is no financial contribution from the school.

The enormous body of benefits for both staff and student development are entirely without financial cost to the school.
 

Even distribution
International tours are not usually provided for in the school budgets. Any payments by the school may be viewed by some as a financial boost for a select few.

Staff travel free
KANES provide free seats for the accompanying staff so they have no reason to seek financial support from the school.