Four posts. One accounting problem. The British Empire, examined through its own fiscal records, parliamentary debates, and the most rigorous academic cost-benefit study ever conducted of it, resolves into a recognizable structure: a system whose costs were socialized across a broad population and whose gains concentrated in a narrow connected class. This is not a moral verdict. It is a structural description. And it explains more about how colonial economies worked — and how their successors work — than any amount of rhetoric about civilizational mission.