It is not incredibly difficult for International students to stay in Australia after graduation. They don't necessarily deport people after graduation, your profession HAS TO be on the skilled migrant list to get a PR through work skills. If not, than you have to try other means.

As far as comparing Australian medical schools and doctors to those in India, you must be smoking something really potent. Australia's physicians are far superior. Another thing, India is a third world country with a per capita GDP of about $2000US, Australia has a per capita GDP of about $30,000US in terms of PPP. There is a much higher standard of living in Australia than in India. If you ever took mathematics, this means the average economic output of Australia is 15 TIMES that of India.