Explanation:

Cabinet Secretary is also the head of the civil services. The Secretaries felt it necessary to keep the Cabinet Secretary informed of developments from time to time. Committees are constituted for discussing specific matters and proposals emanating from various Secretaries to the Government and meetings are held under the chairmanship of the Cabinet Secretary.
Among the inter-Ministerial matters, the coordination is required for:

•  Removing difficulties.
•  Removing differences.
•  Overcoming delays.
•  Coordination in administrative action.
•  Coordination of policies.

These are achieved with the help of the Cabinet Secretary.