大众往往过度聚焦于高调的科技巨头与超级亿万富豪，却忽略了全美前0.1%富裕阶层中更庞大的隐形财富群体。经济学家齐达尔（Owen Zidar）与茨威克（Eric Zwick）指出，全美至少有18兆美元由这群非公众人物掌握，他们人数多达足以填满一座中型城市，其财富扩张速度与超级富豪不相上下，并透过豪宅及私人飞机市场的快速增长显露其影响力。

这些常被称为「大街百万富翁」（Main Street millionaires）的阶层，主要致富途径并非矽谷或华尔街，而是遍布全美的各类未上市私人企业，如法律事务所、医疗诊所、汽车经销商与制造分销商等。由于他们的据点深入各州与国会选区，对华盛顿的政策具备极大游说力，促成了有利于企业主而非受薪劳工的双轨税制结构，并透过法规优势持续巩固其经济地位。

尽管这些企业主常以苦干起家体现了美国梦的实现，但研究同时揭露其致富手段包含压缩劳工所得份额、收购竞争对手以及阻碍市场新进者。富人阶层一方面创造就业与推动创新，另一方面也借由扭曲规则保障自身利益，促使学界与社会反思如何在肯定其成就的同时，促使其对国家承担相应的回馈责任。

While the public remains captivated by high-profile tech titans and vocal billionaires, economists Owen Zidar and Eric Zwick emphasize that the wealthiest 0.1% in America control an overlooked reservoir of wealth totaling at least $18 trillion. Large enough to populate an entire city, this low-profile cohort is growing richer nearly as fast as top billionaires, with their expanding footprints visible through surging sales of luxury estates and the widespread use of private aviation.

Rather than relying on Wall Street speculation or Silicon Valley startups, these "Main Street millionaires" predominantly accumulate fortunes through privately owned middle-market enterprises—including auto dealerships, medical practices, law firms, and regional distributors. Because they are geographically dispersed across every state and congressional district, they hold immense political sway, successfully lobbying for tax regimes and regulatory protections that systematically favor business owners over wage-earning laborers.

While their entrepreneurial journeys highlight perseverance and illustrate that upward mobility remains possible, the findings also illuminate darker practices, such as compressing workers' wage shares, acquiring rivals, and erecting barriers against new competitors. Consequently, these elites foster economic growth and employment while simultaneously tilting the playing field in their own favor, underscoring the urgent need to balance admiration for their success with greater civic contributions.