Why does Charlie decide to pay Squizzy 3 pounds owed him by Kenneth Cornwall out of his own money

Charlie feel sorry for Kenneth. Daisy warns Charlie that there are some nasty people among the Richmond push. He walks her home, as he worries about men trying to rape her or be violent with her. She tells him to do something good with the money he’s saving, which gives Charlie the idea to take three pounds of his own money from under his bed. At Squizzy Taylor’s, Charlie notices Squizzy's cheeks are red and that he’s been drinking. He gives him the money, saying it’s all there.