What is a class D zone for? In my opinion it is there to protect IFR passenger carrying traffic landing at international airports. It also allows access to VFR, aircraft with the controllers authority.
One of the the above is a commercial entity, with schedule
Es to meet and large costs to pay, landing at an airport which also has time demands on its runway. The other is someone flying for p,ensure on a sightseeing trip.
Given this, which one will the controller give priority to? Remembeint that this controller also works for a commercial company dependent on the airlines for its income.
Is it time to start charging for VFR crossings??? It's a commercial world after all.