Jokes related to robots, seek answers.

The boss bought an industrial robot for the factory to improve efficiency. A month later, the representative of the robot company visited the factory, only to find that the packaging of the robot was unopened and placed next to the production line. He was puzzled and asked, "Why did the factory buy robots?" The boss replied, "To improve efficiency." "Then why not pretend?" "I told the workers that if anyone was lazy, I would replace him with a robot, so the workers worked hard and doubled their efficiency."