Giving to those who beg

Ran across this story from the experience of C. S. Lewis.  Tell me what you think of it.

One day, Lewis and a friend were walking down the road and came upon a street person who reached out to them for help. While his friend kept walking, Lewis stopped and proceeded to empty his wallet. When they resumed their journey, his friend asked, "What are you doing giving him your money like that? Don't you know he's just going to go squander all that on ale?" Lewis paused and replied, "That's all I was going to do with it."