There was a survey [citation needed] how the tips are distributed among staff, or rather how the collected tips are used, and one place (or rather the owner of the place) uses the collected tips to pay the electricity bill.

One more reason (I don't know where the money is going) for me not to tip. (That can be helped by giving it directly to the staff, so he can keep all of it to himself - but that would be unfair to those who do work in the background, and in a restaurant it's the cooking that is important, serving could be done by a machine).