Christian Jarrett summarizes a new study that explained why power increases dehumanization but why it sometimes "serves a function, allowing leaders and certain professionals, such as doctors, to cope with the decisions they have to make":
By treating other people as objects or tools, the emotional consequences of the powerful people's actions are downplayed and become irrelevant,' the researchers said. 'Although this can lead people to abuse others, it may also facilitate the powerful in making tough decisions. ... Without dehumanising they would be overcome by the pain and suffering that result from their decisions.