Technology

You don't work with people, not really. You manage them. Your job is to strategically use them for maximum productivity; workers might be allowed some small amount of input but only as long as it can be fit within your "roadmap strategy". Your job it to discipline the workers and keep them on task. And, of course, make sure they never unionize.

These problems are structural. I don't care what your motivations are, your class position is as an underling enforcer for the boss and you're bourgeoisified by your position within the class structure. A manager, within this specific class structure, has every incentive to be an enemy of the workers. An individual manager can choose to become a class traitor, and people in management can be extremely powerful union organizers! But it rarely happens because it requires they betray their own class interests. It's structural.