Because they're sociopaths with a need for control over every aspect of our lives they can get. Until that reality sets in and it gets acknowledged, not much will change.

"I didn't become a boss to effect greater change in the world, I became a boss so I could see people working for me, so I could know who was in charge". The petty man's ego is the greatest impediment to human progress, and indeed survival, today.

^^this^^