Malcolm Turnbull seems to have figured out how to get Donald Trump’s attention -- show your Goldman Sachs stripes and talk about ways to finance big, beautiful things. Like sewer systems.

During his recent sojourn to Washington, Turnbull wasn’t above bragging about how much retirement money we’ve all got tucked away under our mattresses. He was there to push the Australian agenda for trade and investment, with high hopes of dazzling the world’s most mercurial leader after an awkward start to their relationship. For reinforcement, the PM arrived with more than 20 other powerful finance and political leaders in tow.