The Global South does not face a simple shortage of capital. It faces a mismatch between the scale, currency, risk, tenor, and public-purpose characteristics of infrastructure investment and the forms of finance currently available. Countries need more power, transport, water, digital networks, urban systems, and climate-resilient infrastructure at precisely the moment when public budgets are constrained, external borrowing is expensive, and international investors remain selective about emerging-market risk. In 2024, low- and middle-income countries received USD 100 billion in private participation in infrastructure, a 20 per cent increase from the five-year average of USD 83.7 billion. Yet the OECD estimates global infrastructure needs at USD 6.9 trillion annually through 2030, with developing countries facing the widest deficits. The gap between USD 100 billion and USD 6.9 trillion is not primarily a supply problem. It is an architecture problem.