Again, we're legislative budget officers. When we talk about fiscal sustainability, we talk about a calculation that looks at aging demographics and productivity and asks what fiscal actions will be required to maintain a stable debt-to-GDP ratio. We're talking about stabilizing the debt-to-GDP ratio, and in our calculation it is something around 34% at the federal level of GDP.
I think in the context where you're talking about across-the-board actions, whether it be corporate profits or personal income taxes, or whether you're talking about spending reductions to close a fiscal gap—we say we have a fiscal gap in this country—you need sustained actions. They need to be permanent. Again, temporary freezes won't do it. I should probably also say that everything is assumed in terms of legislated.... If there are legislated corporate income tax reductions, we build them into our forecasts.
But in terms of your question about productivity and the debate about productivity, again, it's highlighted in my remarks today. I think over the past ten years we've averaged 0.8% average growth in terms of labour productivity per hour, and it's well below what we've seen historically.