How many physicians actually "income sprinkle"?  I have read that stopping income sprinkling may at the most bring in $250M from all small businesses  which really is a rounding error in Gov't tax revenues.  
Since the Gov't is talking tax reform I hope the they don't stop with small businesses.  How much does the Gov't lose from the passive investing capital gains that home owners make when they sell their homes.  How much do the tax deductions for donations to political parties and charities cost the Gov't?  Since it is fair to attack small business owners why not everyone?