Should I dump my friend?

I have a friend who does manual labour for 8 hours a day when he has a physical disability. Every step that he takes hurts and I work in an office environment and live with my parents. When we hang out, I always pay for him because I know he works harder for his money and lives without the support of his parents. He's always asking me to buy him things and I buy it for him. Last time we met a girl at the bus stop, she worked part time, minimum wage and had to go 3 days without food because she couldn't afford to eat. She told us she gave her child up for adoption. My friend Joshua, then gives her a dirty look and asks her why she did that half an hour after meeting her. When she said she didn't have money, he gave me an accusing dirtly look and says "you said there is no poverty in canada." (and tried to humiliate me in front of her, and entice her against me) I think he's an arrogant jerk for judging me... as if he is God himself, perfect and without flaws. I loathe him for doing that... Am I right?