As an Australian, I’ve have been resisting the temptation these past few months to react to the Trump Administration’s big infrastructure plans with “The U.S. could learn a lot from my country.” The international comparison gambit rarely works well in America, and I don’t want to appear too parochial. But I have learned a lot from the Australian example, and I think now is the time to share, as the Trump Administration pursues a plan of federal infrastructure investment intended to stimulate state, local and private investments. These events reinforced the three core truths about infrastructure:Building first-rate infrastructure — roads, bridges, ports, high-speed rail, airports, power grids, cell phone networks and fiber optic cables — is essential to realizing the full potential of all economies.The sheer scale of the global infrastructure challenge is so enormous that the only possible way to meet it is to find a much bigger role for the private sector.Savvy governments can ensure that increasing the role of the private sector in infrastructure furthers their mission of serving the broad needs of society.