Donald Trump announced Tuesday that the world’s richest man, Elon Musk, will lead a new US government efficiency group tasked with cutting federal waste, as the Republican president-elect added a series of seasoned figures and hardliners to his incoming administration. Musk became a key ally to Trump during his campaign, reportedly spending over $100 million to help the Republican win and repeatedly boosting Trump’s candidacy on X, the platform he owns. Trump said Musk and another stalwart ally, businessman Vivek Ramaswamy, would lead a “Department of Government Efficiency (‘DOGE’)” a tongue-i…