Research by Natasha Sarin of the Law School and Wharton School and former treasury secretary Lawrence H. Summers found that restoring IRS funding to 2011 levels would allow the U.S. government to acquire as much as $1 trillion over a 10-year period.
https://www.washingtonpost.com/opinions/it-takes-money-to-make-money-we-need-to-help-the-irs/2021/03/25/00ac98ba-8b2d-11eb-a6bd-0eb91c03305a_story.html The Washington Post