Dear Ranjith, the job opportunities are always high in medical field. MSW passouts with specialization in the medical field can work in hospitals, nursing homes and rehabilitation centres.
Substance abuse is another area where social workers are high in demand. MSW graduates can work in substance abuse areas like rehabilitation centres, prisons, private practices and non-profit organisations. Social Work graduates help in the treatment and rehabilitation of people addicted to drugs and suffering from problems related to other negative emotions like anger and mood swings.
Another area where social workers can find jobs is social school work. A MSW graduate can work as a counsellor and offer guidance to students and address their issues.

Having metioned the scope in thus field. It's time to go for the jobs.

The salary and perks for social workers depend majorly on the qualification and the work experience of the candidates.
Freshers can easily get a salary of Rs. 8000 to Rs 15,000 in govt and non-govt sectors.
International NGOs and organisations like UNESCO, UNICEF, WHO pay higher salaries and perks to their social workers.
India is a growing economy there is an increasing demand for the social workers who can tackle all the problems of the society.

All the best :)
Hope this helps :)