The Fatal Flaw of the Political Pantry
Politicians love a quick fix. They crave the optics of "doing something" while the public feels the sting of inflation. The SNP’s pledge to cap supermarket prices is the ultimate siren song: a promise of stability that leads directly to empty shelves and a thriving black market. It’s an economic fairy tale designed to win votes, not to fill bellies.
When you artificially suppress prices, you don’t lower the cost of living. You simply transform a financial cost into a structural one. You replace a price tag you don't like with a shortage you can't survive. For an alternative view, check out: this related article.
The "lazy consensus" suggests that supermarkets are simply greedy middlemen hoarding record profits. The reality? Grocery retail is a low-margin bloodbath. Operating margins for the major UK players typically hover between 2% and 4%. If you force a cap on the price of milk or bread that falls below the cost of production and distribution, the supermarket doesn’t just "absorb" the loss out of the goodness of its heart. It stops stocking the item. Or, it jacks up the price of everything else to compensate.
The Arithmetic of Scarcity
Let’s look at the basic mechanics of supply and demand. Prices are not arbitrary numbers pulled out of a hat by a CEO in a pinstripe suit. They are signals. They tell producers how much to make and consumers how much to buy. Related analysis on this trend has been published by Business Insider.
When a price is capped below its market equilibrium, two things happen immediately:
- Demand Spikes: People buy more than they need because the item is perceived as "cheap."
- Supply Crashes: Farmers and suppliers, facing costs that exceed their returns, either reduce production or pivot to different products that aren’t capped.
[Image of supply and demand curve with price ceiling]
History is littered with the corpses of economies that tried to ignore this. From Diocletian’s Price Edict in ancient Rome to the disastrous "Solidarity" caps in the Eastern Bloc, the result is always the same. You get a queue. You get a "Sold Out" sign. Then you get a shadowy figure in an alleyway selling that same loaf of bread for five times the "capped" price.
The Margin Myth
Critics point to "greedflation," claiming supermarkets are using inflation as a smokescreen. This ignores the brutal reality of the global supply chain. Energy costs, fertilizer prices, and labor shortages are real variables. They are not "corporate excuses."
If a supermarket’s cost of goods sold (COGS) rises by 10%, and the government forbids them from raising prices by more than 5%, that supermarket is effectively being ordered to go out of business. In a capitalist framework, a company that cannot cover its costs ceases to exist. If the big four supermarkets start closing stores because they are loss-making, where exactly are people supposed to buy their "capped" groceries?
The SNP’s proposal assumes that the supermarket is the end of the line. It isn't. The supermarket is a tiny link in a chain that stretches back to Ukrainian wheat fields and Dutch greenhouses. A price cap in Holyrood doesn't lower the cost of diesel for a tractor in Aberdeenshire. It just forces the farmer to bear the brunt of the cost until they go bankrupt.
Shrinkflation and the Shell Game
When you regulate the price, you don't regulate the product. Caps inevitably lead to "quality fade" and aggressive shrinkflation.
You might pay the same £1.50 for a block of cheddar, but suddenly that block weighs 350g instead of 400g. Or perhaps the ingredients are swapped for cheaper, inferior alternatives. By capping the price, the government effectively incentivizes manufacturers to lie to the consumer through packaging and chemistry.
It is a shell game where the shopper always loses. You feel like you're winning at the till, but you're bringing home less nutrition and lower quality. This isn't a "social safety net." It’s a race to the bottom that punishes the very people it claims to protect.
The Hidden Cost of Cross-Subsidization
Supermarkets are masters of the "Loss Leader" strategy. They already cap prices on essentials like milk to get you through the door, hoping you’ll buy a bottle of gin or a fancy steak on your way out.
If the government mandates these caps, supermarkets lose the ability to manage their own risk. To keep the lights on, they will be forced to raise prices on non-capped items aggressively. Your "cheap" bread will be paid for by an eye-watering increase in the price of fruits, vegetables, and household goods.
This creates a "poverty trap" within the aisles. The healthy, fresh options—the stuff we should be encouraging people to eat—become luxuries while the processed, capped staples become the only affordable choice. Government intervention in pricing is, quite literally, a recipe for a public health crisis.
Competition is the Only Real Cap
The UK has one of the most competitive grocery markets in the world. The rise of Aldi and Lidl did more to lower food prices than any government mandate ever could. These discounters didn't lower prices because a politician told them to; they did it to steal market share.
When the government steps in, it kills that competition. Why would a new player enter a market where their potential profit is dictated by a civil servant’s spreadsheet? Regulation protects the incumbents. It creates a "managed" market where the big players can lobby for favorable terms, while smaller, more innovative retailers are crushed by the compliance costs.
Stop Asking the Wrong Question
The public asks: "How can we make food cheaper?"
The government answers: "By making it illegal to charge more."
This is the wrong question and a catastrophic answer. The real question is: "Why has the purchasing power of the pound collapsed so significantly?"
The answer to that lies in monetary policy, energy independence, and productivity—not in the price of a pint of semi-skimmed. Capping prices is like trying to fix a fever by breaking the thermometer. It hides the symptom while the underlying disease gets worse.
If you want to help people afford food, you tackle the input costs. You lower the tax burden on producers. You slash the red tape that prevents farmers from scaling. You fix the energy grid so refrigeration doesn't cost a fortune. You don't pass a law that tells a shopkeeper they have to lose money on every transaction.
The Brutal Reality of the Shelf
I have worked with supply chains that operate on "just-in-time" delivery. These systems are incredibly fragile. They rely on precise price signals to move goods across borders. The moment you introduce a price cap, you introduce friction.
Suppliers will prioritize markets where they can make a profit. If the UK (or Scotland specifically) imposes caps, global suppliers will simply divert their containers to Ireland, France, or Germany. We will be left with "affordable" prices for products that don't exist.
You cannot eat a price cap. You cannot feed a family with a manifesto pledge.
The SNP is offering a sticking plaster for a gunshot wound, and they are doing it with someone else's medical supplies. It is a cynical play that treats the grocery store as a political playground rather than a vital piece of infrastructure.
Stop cheering for the "cap." Start bracing for the shortage. If this policy goes through, the most expensive food in the country will be the food you can't find.
Go tell the farmer in the Highlands that he has to sell his beef for less than it cost to raise the cow. See how long he stays in business. Then ask yourself who’s going to be stocking the meat aisle next year.
Economics doesn't care about your "fairness" metrics. It only cares about the math. And the math on price caps always ends in zero.
