80% of income tax bill... this is a pure fallacy 
......

Really? Why.......?

As to ; "Doctors earn their after tax take home pay more than most", that my Dear Sir is not only nonsense, it is a flagrant lie. 

Doctors/dentists/ lawyers/accountants have been "gaming" the tax code for many years, the one result of these "aggressive accounting" practices being;

80% "savings on/in income-taxes 

Period.