From Tom Stoppard's play, "India Ink":
Dilip: You have to understand that begging is a profession. Like dentistry. Like shining shoes. It's a service. Every so often, you need to get a tooth filled, or your shoes shined, or to give alms. So when a beggar presents himself to you, you have to ask yourself — do I need a beggar today? If you do, give him alms. If you don't, don't.