There are certain things that businessmen consider on how they choose their man power should be, it may either be human-powered or robot-powered. Some choose robots because it is more efficient. It creates products with accuracy that man can not do. It is much faster and does not make rejected products. It can be more cheaper since it does not require salary. But robots still have flaws. Robots require electricity and/or gasoline which is pretty much an expense. It can malfunction so you will still need to hire men for maintenance. Less people means leass employment, meaning you do not create job opportunities.