"The system of responsible government to successful in practical working, requires the existence of a competent and independent civil service, staffed by persons capable of giving to  successive Ministers advice based on long administrative experience, secure in their position, during good behavior, but required to carryout the policy upon which the government and legislature eventually decide.”
The Indian subcontinent being the largest democracy in the world, from the time of independent, has an exceptional bureaucracy that form the backbone of the govt,. though the govt changes now and then as per the political aspirations of the masses. The bureaucracy remains stable. The civil servants form the core of bureaucracy being recruited by the UPSC through examinations.
Since the Competition is getting tougher day by day total devotion and high level coaching becomes very essential.