Contrary to popular opinion, it is not wrong to use a human being. It’s wrong to ab-use someone. It’s wrong to exploit someone. It’s wrong to deceive someone and then use them under false pretenses. However, provided that the person in question has consented to being used, and that they’re adequately compensated, there’s nothing wrong with one person or organization using another. This is called “employment.” Without it, the world as we know it would cease to go round.