When you pay the bill, the electricity is like 3 baht or so per unit, one of the schools on the Hall of Shame provided an apartment for teachers and charged for electricity, don't know how much, but probably 5 to 6 baht per unit since that is standard in apartments. A friend worked at a school in Chonburi and had to pay 5 baht per unit in the school provided apartment.
My friend never complained because he didn't know that he was being scammed. The school was making a profit of more than 1000 baht a month off of him. Ok, maybe this is a small issue, but if a school is providing a free apartment as part of the deal, then they shouldn't be turning around and making a profit off of the teacher. How many teachers would get a little irked if the school was transparent and said, "Hey look, we are giving you this apartment rent free, but instead of charging you for the actual electricty usage, we are going to charge you 70% more in order to make a profit."