interesting. what makes you think so?
consequentially the German IRS has bought data from Swiss and Liechtenstein tax haven whistleblowers. several times so. and to the amazement and applause of the public, very prominent figures went to jail. like soccer legend Uli Hoeneß.
the corresponding Wikipedia article is surprisingly not available in English yet:
https://de.m.wikipedia.org/wiki/Steuers%C3%BCnder-CD
long story short: if you, the American people, elect representatives who want a fair system, you will get a fair system.
of course IRS will go after tax fraud at scale if you make them do that.
Your average middle class person can't afford to risk taking the irs to court.