People abuse people every day. But much of this abuse occurs between adult people who have the physical power to leave. When someone is abused at their work place, within reason it is both unpreventable and to be expected. After all, there are a lot of insecurities at work whenever one person is expected to be accountable to the person who immediately supervises them. And since abuse naturally springs forth from insecurities, it makes perfect sense that bosses are going to occasionally abuse their people.
When one person in a home feels insecure, they do not have to become abusive toward anyone else in the home. However, in almost every case, they are going to do so at some point if their insecurity reaches a certain level of intensity. An insanely jealous spouse may verbally (and even physically) attack their partner, and a parent who has simply had enough at home or at work may use unnecessary force against their child. These things are not right, but they do happen, stopping this is the responsibility of people who care.
Of course, this is mission impossible. Until everyone in the world is completely secure in themselves and their role in the world, abuse is going to continue all over the world. It knows no racial boundaries, no class distinctions, and affects everyone in some way or other. It may even be the case that at some point, everyone has been abused. Personal emotional security is the only real solution to abuse.