Chappal stand in Perumal Kovil koil temple Madurai koodal azhagar

I recently went to koodal azhagar Perumal koil temple in Madurai and I was asked for payment for three chappal pairs as 3 rupees. This is usually free and we do not have to pay. However we opt for giving some tips as such for taking and servicing out chappals. Can we make it mandatory not to ask the general public? I knew that it is free, hence I am telling this, but the general public and foreigners should not be disturbed on this? Can the contract holders be careful about it and make sure their employees are trained about not to ask any payment for the chappal stand?