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When his wife Benizir Bhutto was prime minister, there was a perception of many Pakistanis that he was getting 10% graft on all government construction, development and purchases. After his wife was assassinated, he was elected Prime Minister, and the notorious nickname stuck even then.
This is one of the reasons that people get involved with cults.
Wilson appears to be the first to use the "bang for the buck" phrase. In this original use, it was less of a metaphor than it usually in as it described atomic testing.
Politicians, even kings, have always had to make decisions to balance the interests and public opinions of different groups.