Which is good TRB Exams or Seniority for posting a teacher ?

The Teachers Recruitment board (TRB) conducts competitive exams for selectiing the right teachers for the schools in Tamil Nadu. Each government changes the way of selecting the teacher. One government supports the TRB competitive exams and the other supports seniority through Employment offices. So there is no proper and constant way in selection of teachers.

Through competitive exams many youth gets the golden opportunity to expose their talents and gets the placement. This could pave way for the selection of good teachers for the schools in Tamil Nadu. But when considering on the senior candidates and waiting for years for the job are being decieved by this exam system.

As my idea goes I suggests that the placement could be divided into 50/50 for each type of selection. What is your opinion on this ?