Opinion: New Zealand should treat loyalty-card grocery discounts as an early warning about a wider pricing problem, not as a narrow supermarket complaint.
Consumer NZ has warned that loyalty data for grocery discounts could ultimately push supermarket prices higher. Parliament is also considering the Fair Trading Amendment Bill, which it describes as an update to the core consumer law framework. Those two facts should be read together. The more digital pricing becomes, the less useful old-fashioned consumer protection becomes if it only asks whether the sign on the shelf was technically accurate.
A household does not shop in legal categories. It shops in pressure. It checks the milk, bread, fruit, nappies, pet food, petrol balance and power bill. If a supermarket says a price is cheaper for members, a bank says a rate is better in the app, or an energy company says a household can save by shifting usage, the customer has to decode conditions before making a basic decision. That is not a modern convenience when the trade-off is unclear. It is a transfer of work from the seller to the buyer.
Loyalty schemes are not automatically bad. Many shoppers like them, and a clear member discount can be a real saving. The problem begins when the discount hides the baseline. If the ordinary price rises, the member price looks attractive, and the shopper has no simple way to know whether the deal is fair, the word "loyalty" starts doing too much work. It turns a data-collection relationship into an emotional promise.
Personalised pricing would make that problem sharper. If two households can be offered different prices because a retailer knows their habits, income signals, suburb, brand preferences or urgency, then comparison becomes harder. The market can still look competitive from a distance while each customer sees a different version of the market. That is not a theory New Zealand can ignore until it is fully embedded. Once shoppers get used to opaque app-only prices, the rules will be harder to reset.
The Fair Trading Act has always been about more than punishing obvious scams. It is meant to keep everyday trade honest enough that people can participate without needing a lawyer, data scientist or spreadsheet. Digital pricing challenges that basic promise. A price can be technically disclosed and still be practically confusing. A discount can be real in one transaction and still push the system toward higher overall prices.
The Government does not need to ban every loyalty scheme or freeze retail innovation. It does need plain rules before the market normalises personalised offers. Consumers should know when a price is personalised, what data was used, whether opting out changes the price, and how the offer compares with the non-member price. Unit pricing should be clear. Expiry conditions should be visible. App-only discounts should not become a way to penalise people who lack devices, time or confidence.
The household test is simple: can a reasonable shopper understand the real price quickly? If the answer is no, the pricing system is serving the seller more than the public. New Zealand should fix that before data discounts become too ordinary to question.
