They could easily automate the penny making process. All the coins really. Of course, they’d still have to make them. Seems to me that they ought to just start making the same coin, but at a 2 cent value, to match the inflation and reduced value of our fiat currency.
They should eliminate the nickle, it’s a loss too.
Then they should change the quarter to a 30 cent piece.
At that point you could trim the bottom decimal place of the system and make coin change for any transaction with 4 or less coins.