Yes, some barriers do exist, and they can be divided into two categories: natural barriers and unnatural barriers.
Natural barriers include things like population growth, which is slowing down at the moment and will continue to slow. Baby boomers born in the 40s and 50s are retiring. That is a global phenomenon; this situation is not unique to Canada. Global growth potential has been re-evaluated at 3.25%, down from about 4% five years ago. That is a pretty significant slowdown. In Canada, the potential growth rate is 1.5%. The question is, what are we going to do to raise that rate?
Some of the other less natural barriers include things like domestic and international free trade agreements as well as regulatory opportunities. At the G20, when it comes to government priorities, we talk about structural reforms. That is the most important thing. Countries have long lists of things they can do to increase growth. Growth of just 0.1% or 0.2% may seem insignificant, but over the long term, it's important.
Ms. Wilkins, would you like to add anything?