The comment I would make on that is that there is no doubt about the stress on workers when they see scabs crossing the picket line. Go to a picket line where scabs aren't crossing the picket line; it's a very settled picket line. They're doing what they're doing with their right to protest and with their right to do what they do.
Then go where there are scabs crossing the picket line; it's emotional and it's ugly. It's like people are stealing their livelihood from them and their families and children.
The other thing about scabs, which came up before, is that in Canada, a thousand workers die each year on the job. Why are you now going to start bringing in unskilled, barely trained people? Is it worth the life of a worker so that some business can make 10 more widgets while their workers are outside instead of going to the collective bargaining table and reaching an agreement?