“My research has suggested that it would be difficult to come to a definitive conclusion at this time as to how this new Bill 66 will affect the government procurement process.
On one hand, I have said that when you restrict bids, the price goes up.
I have also said that if too many contractors pick up bids (over seven for example), it is less likely that those contractors will take the time to compete with such a large pool of bidders.
I have not seen any undisputed, factual, information that the cost of using union contractors on large construction projects borders on a 40 per cent premium.
It has been my observation that the main reason for over-priced projects can be directly attributed to the procurement process, not labour rates.”
via Procurement Perspectives: Value for money: Bill 66 and union versus non-union – constructconnect.com