I didn't say it was a publicly listed price. You could have a deal set up with the store's owner, that's fine. Having an individual deal with a cashier that results in the rest of the customers having a slightly lowered experience to the benefit of one person and it
not going to the owner is the problem. If the owner is fine with the quality for the general public going down and what that does to his business, that's fine and the owners's call to make as to whether it's beneficial overall. If an employee is taking all the benefit and giving the negative consequences to the business, that's a problem.
There are portions of what schools are doing here which are perfectly normal. There are portions which may not be (I imagine public funding may preclude certain admittance options, but I'm not sure). If the school is willing to put up with now the public perceives these actions and how it affects their business (because it is a business), then that's their decision.