I can understand the angst caused by the subject matter of this thread.
The incomes of doctors is a very sensitive topic for everyone concerned. The public at large /patients do not wish to feel / believe that their medical practitioner is a major income recipient as I suspect that this creates a gulf between them and their doctor. Therefore, the true incomes and wealth of doctors in private practice is often well hidden. The vast majority of doctors do not ostentatiously display their wealth for the public to see. Mansions inconspicuously located in suburbs full of mansions are not easily seen. Whilst driving a beat up corolla to work, there may well be porsche 911 garaged on a holiday acreage. Others may own multi-million dollar property or share portfolios.
There are about 30,000 specialist doctors in this country and about 80,000 doctors all up.
http://www.aihw.gov.au/medical-workforce/
Most of them will constitute the top 1% of income earners in this country.
Whilst not advocating that any one does medicine purely for money and indeed, the wealth of doctors is often a nice by product of their work, a discussion of incomes is very relevant in any forum wherein wealth building / investment / personal finances is the focus of discussion.
Income is relevant to investing of any form and indeed, no one can start any form of investing, especially at the early stages, without some form of income.
My simple assertion is simply that a medical degree is one of the easier and more guaranteed ways for a young person to join the top 1% of income earners quickly and for a long time, over other tertiary educated professions. The potential for increasing income are unparalleled as your core business consists of an essential service. If you are a qualified doctor, and you were not in the top 1% of income recipients, I would query your business practices and your ability.
If we were discussing income of CEOs of major companies, I think that there would be a lot less angst.