Exploitation and effective altruism

How could it be wrong to exploit – say, by paying sweatshop wages – if the exploited party benefits? How could it be wrong to do something gratuitously bad – like giving to a wasteful charity – if that is better than permissibly doing nothing? Joe Horton argues that these puzzles, known as the Exploitation Problem and All or Nothing Problem, have no unified answer. I propose one and pose a challenge for Horton’s take on the Exploitation Problem.