Foreign Aid in game is only a net benefit for everybody, even on a Global Scale, in reality aid benefits rich countries more than it does poor countries.
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Aid in reverse: how poor countries develop rich countries | Working in development | The Guardian.
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Aid - Wikipedia (Other General Criticism, such as economic dependence, not creating indigenous industries, most of the Afghan budget was US money, increasing conflict duration, ulterior motives, etc.).
This should be reflected in game.