《明史·志·卷五十七》
连年增加赏赐，而要求更多，主管此事的人又从中侵吞，边防费用反而超过相抵的数目。
频年加赏，而要求滋甚，司事者复从中乾没，边费反过当矣。
While the rewards increased year by year, the demands also increased. The people in charge also embezzled part of the money, and the border defence cost actually exceeded the amount saved.