The link to the story you provided stated the statement removed from the website was that "special agents" would have to be willing to use lethal force, not 70,000 agents.
"The Internal Revenue Service (IRS) removed the requirement that
special-agent applicants carry firearms and "be willing to use deadly force" from a job listing."
Plus, according to the Treasury Department (take it for what it's worth), 50,000 of the hires are to replace retiring agents. So, it's a net increase of 20-30,000 agents.
https://abcnews.go.com/Politics/treasury-department-rejects-gop-claims-irs-agents/story?id=88495613
"In a
letter to IRS Commissioner Charles Rettig, Treasury Secretary Janet Yellen said that the agency also is planning on hiring auditors who can enforce the tax laws against high-income Americans and corporations, not the middle class, along with employees to provide customer service to taxpayers. The majority of hires will fill the positions of about
50,000 IRS employees on the verge of retirement, which will net about 20,000 to 30,000 workers, not 87,000."
To me, it appears that the R's are doing what both sides do when it comes to new legislation they weren't in favor of, they exaggerate the negative for votes. Are there going to be 87,000 agents hired? Yes, but 50,000 of that is for replacing the existing workforce that is retiring over the next 5 years. Are there going to be armed agents? Yes, but it is for a special agent force that makes up less than 3% of the IRS workforce. It's a good way to get votes by stoking fear and both sides are very good at it.