Absolutely. We frequently receive emails from immigrants in Canada who take unpaid work out of desperation and for no other reason. In fact, all Canadians are taking unpaid work out of desperation. Federally regulated employers would use these exceptions to take advantage of that desperation and extract work, labour, that's useful to them. They provide training but they are certainly extracting work from people without providing remuneration and without really being accountable for what they're providing to those people.
On June 2nd, 2015. See this statement in context.