I was thinking about this the other day from the opposite direction. Seeing the Salvation Army people outside grocery stores with the bells is a little sad now--because of inflation, the value of loose change just keeps going down and down. At the same time, debit/credit cards are obsoleting cash and making the now-less-valuable change even more scarce.

At least here in the bay area, I imagine they'd do much better with square readers than a bell and a bucket for change.