"Clipped" Roman coins

To be familiar with "coin-clipping," it helps to be as old as me and able to remember a time when coins were made of precious metals like gold and silver.  In that setting it was possible to shave a little metal from the rim of the coin to refashion into another coin (or to sell as bullion).  It was the practice of coin-clipping that led coin manufacturers to introduce "milled" edges, so that clipping could be detected without weighing the coins.

I was reading today about the "Hoxne hoard," which included almost 15 THOUSAND Roman gold, silver, and bronze coins.  Apparently clipping was rampant in that era; almost every silver siliqua in the hoard has been clipped.  I found it interesting that a second reason was given for coin clipping: "a deliberate attempt to maintain a stable ratio between gold and silver coins."