Actually the IRS is less likely to audit big income earners because they can afford tax lawyers to fight them. IRS likes to audit the middle class. They usually just pay up to avoid a long expensive fight.
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