In the federal jurisdiction we have had card certification for many decades, and it has proven, of course, to be a clear way for workers to indicate whether or not they want to belong to a union.
If the board is uncertain about whether or not there is support for a union, the board itself can order a vote. Of course, on many occasions when there has been a vote, the board has found that employers have truly interfered with the workers' ability to choose the union. At the provincial level where a vote is the only form of indication to join a union, the evidence has been quite clear. Never mind my saying it; that's what the academic research has told us, that it clearly allows the employer to interfere with the right of workers to join that union. The situation is similar in the United States.
Why would an employer care if the workers want to join the union? If it's their free democratic and constitutional right in this country, why would employers want to interfere in it other than the fact that if you do have a vote, it gives the employer time to use all kinds of tactics during the time the vote has been ordered? I could list some of the companies that clearly said they were going to close the facility, or cut people's salaries, or lay people off. Of course, ultimately it changed the workers' ability to truly exercise their free choice.
The evidence is there. Within the federal jurisdiction, it has worked very successfully. Again, the bigger question is that other than for ideological reasons, we don't know why this private member's bill was brought forward in the first place.