In 1980, 15 years after the silver coin removal from circulation, the dime had as much buying power as $1 did in 2017, due to inflation. They keep pennies in circulation to give the impression that nothing has changed with our money, and they have to use copper plated zinc coins to keep up the charade. The dollar bill has become a 10c note, and they should be "minting" cents from cardboard. From a common sense perspective they should ditch the pennies, nickels, and paper $1 bills, then base prices on the dime, which is essentially a penny now, and mint $1 & $2 coins to replace the expensive to print and short lived low value $1 paper bills. The biggest reason that we still use paper $1 bills is due to special interest lobbying on Capitol Hill by the paper, ink, and printing industries.