CBI is the premier investigative agency of India with a dual responsibility to investigate grievous cases and provide leadership and direction in fighting corruption across the country. From 1965 onwards, CBI has also been entrusted with the investigation of economic offences and important conventional crimes such as murders, kidnapping, terrorist crimes, etc., on a selective basis. CBI derives its power from The Delhi Special Police Establishment Act.
On the other hand, CVC was set up by the Government of India in February,1964 on the recommendations of the Committee on Prevention of Corruption headed by Shri K. Santhanam. It is the apex vigilance institution of the country, free of control from any executive authority. It is a statutory body.
Although sometimes doubts have been expressed (by some political leaders) reegarding the impartiality of these two prestigious institutions of the country, the professional competence of the officers and staff working in CBI and CVC is beyond any doubt.
The phenomenon of corruption is a social evil mainly prevalent in developing and underdeveloped countries with limited resources and opportunities. There is no relationship between corruption in the country and competence of CBI/CVC.
Beware! I question everything and everybody.