IRS US Treasury Dept scam caller

"IRS US Treasury Dept" scam about pending legal action, caller to my land line had India accent.  I immediately called back on my ID-Blocked cellphone, and background noise sounded like a busy call center as I read HIM my riot act!!  I have received a number of similar Robo-call from different numbers over the last few months

SCAM! Said we owed $5100 to IRS and they "just wanted to help us out of a delicate situation "
Only needed a debit/credit card to take care of it

These calls started around tax season.  Most recent voice mail message from "Kevin Mason", "inviting" us to call back, "intending" to help, regarding US Treasury,  not replying will result in court mandate, appearance before a judge, etc.  We have never received anything of this nature via US mail, nor do we have any reason to think we would.  Simply delete the message and move on with your day.  They are moving on to the next call on their never ending list of innocent people.