The fact is Boss always wants those people who are not much more intelligent.
Their performance should not be better than the boss. Boss always pick your weak points and prove you an unintelligent worker. Boss will hide your performance from the senior management especially where the boss is answerable and report-able. Boss will be angry if you show your performance directly to the senior management because they can promote you, can increase your incentive and may think to replace you with your boss’s position.
So if you are a job holder you must be careful about your efficiency. Because if you prove yourself better than your boss, than your boss can be fired any time. But clever bosses never give you such chances and boss will fire you before you take such opportunity, everybody loves the job.
So what to do?
Just find the right person to whom you need to show your performance. Who can promote you in reality? Who can increase your salary? Who can be beneficial for you in difficult time? If you will be able to find the right person to whom you need to show your performance, only than you will be a successful employee of the company. Otherwise you will ever lose your jobs and face troubles.