So I’m parking my car in the supermarket car park and I’m standing by the ticket machine umming and ahhing.
I need 50ps worth of time. I have got got 50p in change but some of my change is 5p pieces. But the machine won’t take 5p pieces.
Just as I’m about to pay for more time than I actually need a stranger drives up and says “would you like a ticket? It’s until 2”.
“You’re a star!” I say.
The pound I would have spent on time I didn’t need is then spent on a pie, thereby stimulating the local economy.
A cashless world where all transactions are digital might be more efficient. But it would be harder for strangers to give each other gifts.