Now, it's certainly most apparent at the extremes, so, very low tax rates, very flat tax systems, will increase productivity materially. A 100 percent tax on income would mean nobody would bother to go into that tax bracket, because they get no benefit from it. The question is—and it's, in theory, known as the Laffer curve—where in the middle of those two extremes is the sweet spot to ensure people are most motivated and most productive in contributing to the economy and in creating revenue for the Crown to pay for its health, education, law and order, and social services? We're not going to answer that question today, but what we can see is if over 12 or 13 short years, senior nurses who weren't in the top tax bracket have been replaced by second-year nurses going into our top tax bracket, then we have a problem, and it's one that a Government has to address at some point. 