Look no further than the corporate world. I have witnessed first hand individuals who have set out to undermine their superiors or rivals to get up the next rung of the corporate ladder. These people tend to burn out and then discard their staff, they expect the staff to work long hours and weekends without extra pay and refuse or start moaning when you take annual leave. They tend to be penny pinchers except on themselves and work in groups of like minded individuals. Much better to be on the shop floor. The worst position is a Junior Manager. You get all the shit and no cream.
The guy I worked for and his group became successful and all the after hours scheming paid off. Their managers were moved on or their contract not renewed (massive golden handshake) and I walked out.