Doctors who owe back taxes, homeowners who overstate their mortgage interest deduction, and corporations that avoid U.S. taxes are finally receiving the legislative protection they so richly deserve.

For months now, congressional Republicans outraged by the IRS's scrutiny of Tea Party groups have been undermining the agency's ability to crack down on tax cheats. In June, the House GOP proposed reducing the IRS’s budget by $341 million. They also voted to slash the budget of the IRS’s enforcement division by 25 percent, equal to $1.2 billion. Such steep cuts, the Associated Press’s Andrew Taylor wrote, “would mean fewer audits of taxpayers and make it more likely that people who cheat on their taxes will get away with it.”

Now, Politico reports that House Republicans are blocking legislation to give the IRS greater authority to collect back taxes and catch cheaters. “[Republicans are] balking at a Senate plan to go after doctors who owe back taxes and another to make it easier to figure out if someone is overstating the mortgage interest deduction,” Brian Faler writes. “They also won’t accept an effort to cut the number of people wrongly claiming a child tax credit.”

Republicans are also blocking legislation to close a tax loophole that allows corporations to avoid U.S. corporate income taxes. The practice is known as tax inversion. As New York Times columnist Paul Krugman describes in his column Monday, companies use this strategy to “relocate” to a country with a much lower corporate tax rate, thus avoiding the U.S. corporate tax until they repatriate their profits. But these firms aren’t actually physically relocating. They’re simply buying a foreign subsidiary so that they can claim tax residence in the low-tax country. Everything else remains the same—except they avoid the U.S. corporate tax.

Over the past few months, more and more companies have begun using tax inversions to lower their tax bills. On July 18, AbbVie, a Chicago-based pharmaceutical company, agreed to buy the U.K. drug maker Shire for $54 billion, with the explicit goal of reducing its U.S. taxes. It was the largest tax inversion deal on record. Meanwhile, Walgreens is reportedly looking into using this tax loophole as well.