I was expecting the question you raised. It is generally misbelieved that the people who score more during their education are more successful. Practically; these people get good job (which they do for others).
The students who sit at last bench; observe the whole class which is not possible for first bench students. They are free enough to see each and every thing with their own analysis. It develops the mind of the students in a very easy manner. This help to get success in life.
If we presume that only first bench students get success in life then why others are permitted to sit at last bench ? Neither the school administration nor the students and their parents would like this situation.
First bench students are more disciplined than last bench students. But, last bench students enjoy more. Rather I would say first bench students don't enjoy speically in classroom.
During the lecture of the class; hardly four or five lines are important which are told by the lecturer specially in commerce stream. These are easily grasped by last bench students also.
You can try my words when you come out from the class and ask each and every student what they grasped after the class. Each one would tell only 3-4 lines about the lecture.
(Humour :
Above rule is not applicable at Cinema Hall where first bench viewers enjoy more than the last bench viewers - here last bench viewers are more disciplined than first bench viewers).