This has been going on for several years. I know several people that they have called; none of them fell for the scam but it is still very annoying. They are cowards who mainly prey on vulnerable elderly and spouses of recently deceased people who may be susceptible to this kind of scam. Still, good to have as much publicity as possible to make sure that everyone knows about the scam.
Here is one link from two years ago: https://www.consumer.ftc.gov/blog/scammers-continuing-pose-irs-agents
Also check out how much this scam (or at least the IRS variant) has been growing: https://www.consumer.ftc.gov/articles/0519-irs-imposter-scams-infographic