don't the people need permanent doctors?

Nearly 40,000 medical students graduate in the country every year. By posting them to rural areas, the Centre can cut down on salaries, increments and other benefits given to permanent staff members. This is just a cost-cutting measure.

Please try to educate the people around you, your elders, friends, relatives and neighbors.
It is true that govt never spends huge ransom in the process of grooming the doctors. You can use the RTI to obtain such information. After all government doesn't give the required share of budget to the health sector.