Didn't the legislature try to introduce a bill to prevent using the new agents/funding against lower earners, and it flopped? So it turns out all along no one actually wants to keep anyone accountable to such "promises."
https://www.senate.gov/legislative/LIS/roll_call_votes/vote1...
Statement of Purpose: To prevent the use of additional Internal Revenue Service Funds from being used for audits of taxpayers with taxable incomes below $400,000 in order to protect low- and middle-income earning American taxpayers from an onslaught of audits from an army of new Internal Revenue Service auditors funded by an unprecedented, nearly $80.000.000.000, infusion of new funds.
Vote Result: Amendment Rejected