The American CBS Television network ran it's weekly "60 Minutes" television program and today (November 21, 2021) presented a program on Roman archaeologists and the Roman Emperor Gaius or Caligula (AD 37-41).
The episode showed the reverse of a Roman coin of Caligula and mentioned that it commemorated a sales tax reduction:

The coin appears to be a copper Quadrans,
Roman Imperial Coins catalog number 39.
The inscription reads "PONT M TR P III PP COS DES III" with a large "RCC". "PONT ... DES III" were the roman offices Gaius held, Pontifex Maximus, Tribunicia Potestate III, Consul Designatus III.
RCC (remissa ducentesima) refers to the abolition by Gaius of the sales tax of a half percent.
The program host mentioned that coins were a form of imperial propaganda.
The program can be seen here (if available where one is located):
https://www.cbsnews.com/news/caligu...s-2021-11-21