At least read the article. Literally the second sentence reads:

“The agency said that it is taking "urgent" steps to increase compliance such as auditing more high-income taxpayers as well as businesses and partnerships. “

It goes on later:

“ The IRS has said it won't increase audits on households earning less than $400,000 annually.”

No. Why would they do that? There’s no money there. Poor people are on the hook for hardly any tax anyway. The people who cheat generally own companies or are self employed and often have access to cash. It happens a lot in small businesses. It’s a crime of opportunity. Hard to do it when tax is already deducted from your check before you get it. Easy when you can put yourself on the books for a modest salary and pocket a bunch of cash under the table.