According to WaPo:
The bill, known as the Inflation Reduction Act, would put $80 billion toward beefing up the IRS, in line with liberals’ long-term goals to strengthen tax collection and enforcement on corporations and high-income earners, while relieving low-income taxpayers of cumbersome and frightening audits. Some of the additional revenue would go to pay for the largest-ever U.S. investment in clean energy technology.
The idea is that the government could bring in more money by examining corporate and high-income returns than it does by pursuing lower- or middle-income taxpayers who make mistakes on their returns or underpay their taxes by small amounts. The IRS in recent years has grown more dependent on those types of audits because they are relatively inexpensive: They’re automated, and they preserve the agency’s limited personnel resources. But they also mostly fall on taxpayers who can’t afford to fight back by spending hours on the phone with the tax agency or hiring lawyers.