There is a reverence for titles in India.
Whenever you can, use professional titles such as “Professor” and “Doctor.” For those without professional titles, use courtesy titles such as “Mr.”, “Mrs.”, or “Miss.”
Wait to be invited before addressing someone by his or her first name. First names are usually reserved for close friends.
Status is usually determined by a person's age, university degree[s], caste and profession.
Moreover, employment in government service is considered far more prestigious than private business.