A 600 word article in the Guardian relates to the current financial trend for technological innovations to make it easier to pay electronically.
It also links to psychological research that shows we have a tendency to spend more carefully when we use cash and coins than simply waving a card at a scanner. This is because electronic payment systems disconnect us from the reality that we are spending actual money. This is why it is important to keep as much of your budget in cash as possible.
Unfortunately it is getting harder to avoid paying electronically. Internet purchases are always electronic. If you have any ideas on how to give more ‘friction’ to what you buy on the net, I’d be glad to hear them.