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Week 4: Trust at the Slot

Why a stranger hands a machine their card and PIN, and what fee structures hide behind the word "convenience"

15 March 2027 incentive

An ATM asks for more trust in ten seconds than most machines this course studies ask for all week: a card, a PIN, and a promise that the count in your hand will match the number on the screen, with no receipt built to survive an argument. That trust is exactly what a non-bank surcharge is priced against.

Outline

The argument

A card, a PIN and a promise: that’s the entire trust budget a stranger commits in the few seconds it takes to use an ATM, and a non-bank surcharge is priced almost exactly against how little choice they had in that moment. The fee doesn’t appear because withdrawing cash costs more at that particular machine — it appears because the alternative, walking to a different one, is exactly as inconvenient as the operator needs it to be.

A fee schedule reads like disclosure, but functions like a contract you signed by inserting your card: binding, non-negotiable, and almost never read before the transaction that makes it apply. Publishing the fee doesn’t make it fair — it just moves the argument from “was this hidden” to “was this reasonable,” which is a much harder case to make from the other side of the counter.

Question to carry: if disclosure alone made a fee fair, would banks still need surcharge-free networks as something to advertise?

Teaching team