It is important to note that Canada is one of the few countries to systematically apply a test to any investment over the required minimum, which is $330 million at the moment. This is not about whether an investment is positive for the Canadian economy. It rather has to do with the government. We have to ask ourselves what public policies would encourage the government to take action to stop a transaction. That does not take any of the government's power away, since it will still have all the latitude it needs to intervene.
On May 30th, 2012. See this statement in context.