The purpose of the Supreme Court collegium having a majority of future Chief Justices of India (CJIs) as per the seniority norm can be understood as follows: 1. Maintaining seniority: By following the seniority norm, the collegium ensures that judges with more experience and service are considered for the position of the Chief Justice. This allows for a sense of continuity and stability within the judiciary. 2. Upholding meritocracy: The seniority norm ensures that judges who have proven their competence and efficiency over a significant period of time are given the opportunity to be considered for the highest judicial position. This promotes a merit-based approach to selecting future CJIs. 3. Preserving judicial independence: By adhering to the seniority norm, the collegium helps protect and maintain the independence of the judiciary. It prevents any external influence or interference in the selection process, ensuring that the appointment of CJIs is based on internal evaluations and the judges' track record. 4. Enhancing institutional coherence: The seniority norm allows for a smooth transition of leadership within the Supreme Court. It helps build a stronger sense of institutional coherence and continuity by ensuring that judges who have already served at the apex court and understand its functioning become the future CJIs. Overall, the seniority norm in the Supreme Court collegium aims to balance the principles of meritocracy, independence, and institutional stability within the judiciary.