Not as much as the medical field. If you want to study medicine in India in a Pvt Medical College it will set you back 40 to 50 lakhs. On the otherhand you may be spending only a lakh for an MBBS degree in Govt Medical College.
Below is a link for notification by Kerala Govt for recruitment to the post of Asst Surgeon
http://www.keralapsc.org/noti11/cat%20321-11.pdf
The salary is around 39,000 rupees which is a comparatively high salary in my place even in this inflation hit times and correct me if I am wrong but I think Asst Surgeon is a junior rank, so you can imagine how much the senior positions make.
F1 drivers make way more than an ordinary doctor..some CEOs in India earn more than the Indian president.
You cannot fix salaries on the basis of qualification, but you do it on the basis of market demand.