Not sure what help you are asking for. The whole LA scene as described is accurate. There are a handful of 'money' high schools in LA: Harvard-Westlake, Marlborough, Brentwood being the top. Also Mater Die in Orange County. Huge money and connections like you can't believe.
McKinsey is it's own class of influence peddling firms. Mostly a consulting outfit it works with almost EVERY major (Fortune 500+) company in the US. It also has a private equity arm. More here:
https://www.mckinsey.com/industries/private-equity-and-principal-investors/our-insights/mckinsey-on-investing
Many McKinsey alums become CEOs of these corporations, including Google, Boeing, AT&T, Pepsico, etc. Some alums include:
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Chelsea Clinton, daughter of former U.S President Bill Clinton
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Sheryl Sandberg, COO at Facebook and founder of Leanin.org
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Wolfgang Bernhard, Former CEO of Mercedes-AMG, Volkswagen AG and former Chairman of Daimler
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Helmut Panke, Former Chairman & CEO of BMW
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Bob Haas, Chairman of Levi Strauss & Co
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Vittorio Colao, CEO of Vodafone
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Ian Narev, CEO of CBA
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James McNerney, Former Chairman, President and CEO of Boeing
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Brian Salsberg, Senior Vice President, Global Strategy at AVON
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Jeff Skilling, Ex Enron CEO