Usually, it's more ignorance rather than (intentional) cruelty. If your office has a relaxed atmosphere, as a manager, it is very easy to make the mistake of thinking that you are just a regular part of the gang. But of course, you're not, and everyone (except you) is aware of your status and the fact that you control their continual employment, bonuses/raises and career advancement.
This view is reinforced in modern tech culture which is deeply uncomfortable with power and status hierarchies without realizing that a proper hierarchy with defined roles and responsibilities actually makes everyone more comfortable because everyone knows where they stand. The Valve case study of a fully horizontal organization is complete bullcrap because they replaced defined roles and responsibilities and chain of command with an ambiguous and implicit set of roles, responsibilities and chain of command. Nobody there believes that Gabe Newell is just a regular joe, regardless of what his title says.