When I was working in the library, I would be miffed by readers who made outrageous demands on our time and resources. When they were told that what they wanted was not possible, we'd invariably hear an enraged, 'MY TAX DOLLARS PAY YOUR SALARY!!!'
Um, no. Actually, my salary and the entire library was supported by a private endowment. This made it almost impossible to get a raise but I could at least tell these people the truth.