Everybody from President Trump to the Global Infrastructure Forum is trying to think of innovative ways to attract long-term private and institutional investors to pay for the huge and largely unmet demand for new highways, railways, and dams. Promising ideas, including guarantees or gap funding, the concessional blending of finance, and bankability enhancements, have been tried but are not enough to convince overseas pension schemes or high net worth individuals to invest their idling funds in worthwhile projects, especially in emerging economies with untried issuers (Regan, 2017).