"There is a wide disparity in the estimates of the number of millionaires residing currently in the United States. A quarterly report prepared by the Economist Intelligence Unit on behalf of Barclays Wealth in 2007 estimated that there were 16,600,000 millionaires in the USA."
https://en.wikipedia.org/wiki/Millionaire#Number_of_millionaires_by_country
Other sources say less.
"The study found that at the end of 2012, 8.99 million American households boasted a net worth of at least $1 million. This figure is up significantly from 2008 when the number of millionaire households dropped to 6.7 million. However, it fails to top the pre-recession peak of 9.2 million households in 2007.
Read more: http://www.nydailynews.com/news/national/study-finds-9m-millionaires-u-s-article-1.1290334#ixzz2WOqIIREj"
There are many people providing things that make our lives much better. The people who provide those goods and services become wealthy.