Off the top of my head, I don't know a word for the kind of person you describe. But you could try to use these related words: nepotism - the practice of employing family members in public positions or giving family members some advantage in administrative matters because of family connections, not merit cronyism - like nepotism, but for friends or peers pull strings for someone - obtain a benefit in a formal process through an informal connection with someone involved in this process. This idiom not always signify bad corruption - it depends on the context.
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