The tax system must be fair.  If you earn a salary of $80k or you own a business that earns you $80k you should pay the same tax.   The business must not be permitted to pay personal expenses that would normally come out of after-tax personal income.  So sailboats, golf club memberships, cottages, cars, Leafs tickets, etc. should  not be permissible business expenses, even if business  is discussed.