The IRS is launching an effort to crack down on 1,600 millionaires and 75 large business partnerships that owe hundreds of millions of dollars in past due taxes.

IRS Commissioner Daniel Werfel said that with a boost in federal funding and the help of artificial intelligence tools, the agency has new means of targeting wealthy people who have “cut corners” on their taxes.

“If you pay your taxes on time it should be particularly frustrating when you see that wealthy filers are not,” Werfel told reporters in a call previewing the announcement. He said 1,600 millionaires who owe at least $250,000 each in back taxes and 75 large business partnerships that have assets of roughly $10 billion on average are targeted for the new “compliance efforts.”