Excellent article by an investment manager about the makeup of the top 1%:

Who Rules America: An Investment Manager's View on the Top 1%

The 99th to 99.5th percentiles largely include physicians, attorneys, upper middle management, and small business people who have done well.

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Since the majority of those in this group actually earned their money from professions and smaller businesses, they generally don't participate in the benefits big money enjoys. Those in the 99th to 99.5th percentile lack access to power. [...] I speak daily with these relative winners in the economic hierarchy and many express frustration.

Unlike those in the lower half of the top 1%, those in the top half and, particularly, top 0.1%, can often borrow for almost nothing, keep profits and production overseas, hold personal assets in tax havens, ride out down markets and economies, and influence legislation in the U.S. They have access to the very best in accounting firms, tax and other attorneys, numerous consultants, private wealth managers, a network of other wealthy and powerful friends, lucrative business opportunities, and many other benefits.

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[T]he bottom line is this: A highly complex and largely discrete set of laws and exemptions from laws has been put in place by those in the uppermost reaches of the U.S. financial system. It allows them to protect and increase their wealth and significantly affect the U.S. political and legislative processes. They have real power and real wealth. Ordinary citizens in the bottom 99.9% are largely not aware of these systems, do not understand how they work, are unlikely to participate in them, and have little likelihood of entering the top 0.5%, much less the top 0.1%. Moreover, those at the very top have no incentive whatsoever for revealing or changing the rules. I am not optimistic.