You do have jurisdiction in terms of the working conditions of people who are regulated federally, and if you set a good example, that helps. That's the first answer.
The second element, which relates to what was just said, is that the reason we do not have laws that allow parties to contract out and to say they are independent contractors is that regulatory protections are a public order. You can't, for instance, say, “I'm going to say I'm a self-employed person today and not earn minimum wage,” because that would be illegal and it has been that way for 100 years.
You have to be careful in terms of freedom of contract that you're not opening up the idea of people, as I've seen in my research, working for temp agencies and being told “Mondays, Wednesdays and Fridays, you're self-employed”, and they're doing the same work on Tuesday and Thursday. That's a way of getting around public order legislation such as the Canada Labour Code, which is in your jurisdiction.
Of course, if you have best practices legislation federally, that helps in terms of the models you're giving to the provinces.