" IRS audited 6.66% of returns from filers with more than $10 million in adjusted gross income in fiscal year 2018, down from 14.52% in 2017 and even further down from 29.3% in 2011"

Wow, they used to audit 1/3rd of all filers in $10 mil/year bracket? I guess at that level, there aren't too many people with W2 form.