Death by a thousand cuts though. I had to sit a co-worker down and go over his finances because he never learnt at home or school. The amount of €10-25 monthly subscriptions this guy had meant he spent about €500 per month on those. On top of buying everything on payments because he never has any savings.
It’s another example of making use of the flawed human psyche which can’t keep track of the little things.
I’ve read once that eating iron won’t do anything for your iron intake, but for example sticking some rusty nails through an apple for a while and then eating the apple would.