I do have a comment. If the problem is in five years, you're not talking about the demographic impact. What you're talking about now is that the labour force will stop growing in five years. That doesn't mean you need to take in more immigrants now; that just exacerbates the problem. If you want to take in enough immigrants to keep the labour force growing, you don't need to take in as many as we're taking now. It has to be gauged on how many are needed to grow the labour force.
On October 25th, 2011. See this statement in context.