Not true. Perhaps you're confusing income with assets.
The base rate for audits is about 1%. An audit rate of 10% for tea partiers is way out of line.
Million dollar income earners have an even higher audit rate.
http://www.kiplinger.com/article/taxes/T054-C000-S001-irs-audit-red-flags-the-dirty-dozen.html
Just know what I was told from someone who worked for the IRS. They preferred to audit the middle income earners because they couldn’t afford to fund a long term fight. They usually just wrote the check and prayed they didn’t get audited again.