And to give the Treasury some credit, they do go into what might make it possible for those bills to get paid. Well, actually, they make a few assumptions: they think that Government will be able to borrow at 2.3 percent by 2045. So they're predicting that interest rates are going to be stay really low—I hope they're right. They're predicting 1 percent per year labour productivity growth. And GDP growth is, therefore, a measure of labour productivity and how many working-age people come and stay in New Zealand. And that gets you to a few conclusions: for the next generation and the one after that, the people who are going to be working and paying taxes in this country for the next 40 years, according to this report, what matters is how many people choose to come and make their home in this country and stay, and what is their labour productivity.