I don't know that there's a problem with transparency in terms of Canadian companies and how they are operating or why they would be hesitant to join this particular initiative.
A number of organizations are pursuing anti-corruption on a global or regional basis, with international operations in mind. There's the Organization of American States, the OECD, the United Nations, Transparency International, the Extractive Industries Transparency Initiative, and a few others I haven't mentioned.
As to whether the Extractive Industries Transparency Initiative is a good idea for them, I don't know that I would necessarily be able to comment for business.