Re: Seems legit
Joe, while I get where you're coming from, I fear you have a poor grasp of the ratios of income tax versus earned income for America's citizens.
In 2012, the top 1% of earners (people who reported earning more than $434k) paid a tad more than 26.7% of all "individual" (i.e. not corporate) taxes.
In the same year, the top 10% of earners (people who reported earning more than $125k, and including the top 1%) paid 70.2% of all individual taxes.
The bottom 50% of all individual tax returns paid 2.8% of the income taxes collected that year.
http://taxfoundation.org/article/summary-latest-federal-income-tax-data-0
Where to define the break between the "common taxpayers" and the, what, "uncommon taxpayers?" is open for debate. As the data in the link has certain defined breaks, let's use the bottom 75%, which includes anyone who earned less than $73k. The bottom 75% of all personal tax returns filed in 2012 paid 13.6% of the individual income tax collected.
Based on the percentages paid, I would argue that the "uncommon taxpayers," which include the "rich people" you referred to, are overwhelmingly responsible for "prop[ping] up their [own] ventures". Ventures which employ thousands of people directly, and which facilitate the employ of tens or hundreds of thousands indirectly.
I should also point out that the income tax numbers above and in the link are only about half of the taxes collected by the feds for that year. I don't have a link handy for 2012, but 2011's individual income tax income was similar, and was supplemented by about as much from payroll taxes, corporate taxes, and various "other" tax streams, like customs duties and excise taxes.
http://www.npr.org/sections/money/2012/04/13/150441259/what-america-pays-in-taxes