Senator GALLAGHER (Australian Capital Territory—Minister for Finance, Minister for the Public Service, Minister for Women, Minister for Government Services and Manager of Government Business in the Senate) (14:44): I thank Senator Whitten for the question. For as long as I can remember, we've been a country that has welcomed—and, in fact, supported—overseas migration and immigration into Australia, and that has had very positive benefits for our community and our economy. I think if Senator Whitten is linking investment in infrastructure or investment in housing—I'm not quite sure what element of investment Senator Whitten is concerned about—but I certainly accept that, for state and territory governments, investment in infrastructure for growing cities is a challenge. I wouldn't link it to overseas migration numbers. We have seen a big, significant pull forward, Senator Whitten, in response to the borders being closed, and some of that has been people who have been staying here, not leaving. The PRESIDENT: Minister Gallagher, please resume your seat. Senator Roberts? Senator Roberts: Point of order: the question was really simple, as Senator Gallagher said in the first place. We want to know the link between immigration and productivity—that's it. The PRESIDENT: It was me who, indeed, said the question was simple; I meant it was short. You also linked it to investment, so I think the minister is being directly relevant to the question. Senator GALLAGHER: The productivity challenge across Australia has been a challenge for some time. In fact, as we've said in this place, the worst decade was actually under the coalition government. Senator Ruston interjecting— Senator GALLAGHER: Yes, I do understand—thank you, Senator Ruston—I understand completely. The productivity challenge is broader. There are broad reasons underpinning the productivity challenge, and indeed productivity challenges in Australia are comparable and similar to the challenges that are being experienced by like-minded economies around the world. Thank you for your help, Senator Ruston. The PRESIDENT: Senator Whitten, first supplementary?