William R. Scott, The Itching Palm: A Study of the Habit of Tipping in America
“ A waiter, knowing that his compensation depends upon what he can work out of his patron, employs every art to stimulate the tipping propensity, from subtle flattery to out-right bull-dozing. He weaves a spell of obligation around a patron as tangible, if invisible, as the web a spider weaves around a fly. ”
