The real issue is the damage done to the incentive to take risks, to challenge the big players in order to bring better prices and service to consumers.  
Big L Liberals are about big corporate dominance that feeds their need to feel in control.  They'd rather funnel money to Bombardier and to Morneau Shepell, than incentivize the small business segment that creates 75% of new jobs and competition for big corporate players.
They're talking about incorporated professionals to fuel average voter resentment against above average earners, but what they are doing is building Venezuela.