The problem isn't even "corruption" per se. A dictator can do this entirely legally by simply raising taxes in an area (or cutting investment in public services

The problem isn't even "corruption" per se. A dictator can do this entirely legally by simply raising taxes in an area (or cutting investment in public services) whenever NGO-provided cash or services lets the people there afford it. The problem is inherent to governments that are unresponsive to their people.