I don't think profit necessarily implies exploitation. People could make billions while also helping the labor class, and then give back to society. Think of things that improve safety, efficiency, or extend human life -- fire extinguishers, farm implements, some medicines, etc. I'm sure people make money off of these, but I'm still thankful to them. You may be right that most of the capital class is not a net benefit. Nonetheless, I think this kind of broad generalization just distracts us from the real goal of improving human lives.