Somewhere in the middle of a factory shift, the question doesn't feel abstract at all. A worker assembling a component in Penang earns a fraction of what a worker in Stuttgart earns for assembling the finished product those components eventually reach. Both are skilled. Both are essential. The gap between their wages is not, at its root, a story about individual productivity or education levels. It is a story about position.
Where a country sits inside a global supply chain, how close to the final consumer, how much design and brand value its firms control, and how easily its specific role can be handed to someone else, sets a ceiling on wages that no amount of hard work alone can break through. This is the part most economics writing buries in footnotes.
The chain is not flat; it's a slope
Think of a modern supply chain as a long slope rather than a flat road. At the top sits the activity that captures the most value: designing the product, owning the brand, controlling the software or intellectual property inside it. At the bottom sits the activity that captures the least: cutting fabric, soldering circuits, assembling parts that someone else specified to tolerances someone else set.
Economists sometimes call this the "smile curve." Plot value-added against the stages of production and the line dips in the middle (basic manufacturing) and curves upward at both ends (R&D and design on one side, marketing and after-sales on the other). Countries structurally locked into the bottom of that curve find their wage growth constrained in a specific, mechanical way. The buyer at the top of the chain, a large brand or retailer, can nearly always find another supplier willing to do the same low-specification work for less. The threat of substitution is constant, and it functions like a ceiling.
That substitutability is the key mechanism. When a task is modular, meaning it can be described in a specification document and handed to any competent manufacturer, the wage for performing it gravitates toward the global floor for that task. The worker isn't being paid for judgment or irreplaceability. They're being paid for compliance with someone else's spec.
How position translates into a concrete number
Consider a plausible scenario. A European sportswear brand sells a running shoe for roughly a hundred euros. Of that, perhaps four euros represents the cut-and-sew labor cost in the country where the upper is stitched. The brand captures something like forty euros in gross margin. The logistics operator, the retailer, and the IP holder each take slices of the middle. The factory at the bottom of the chain is competing against other factories in Vietnam, Cambodia, Indonesia, and Bangladesh, all of which can perform the same operation. The brand doesn't need to be cruel to keep labor costs at four euros per pair. It just needs to have options, and it does.
Now contrast that with a country that has moved up the slope. South Korea in the eighties and nineties is the textbook case, and it's worth being specific about why it worked. Korean firms like Samsung and Hyundai didn't just manufacture more efficiently. They took on design risk, built their own brands, and invested in proprietary processes that foreign buyers couldn't easily replicate elsewhere. Once a supplier owns the design, the tooling, or the customer relationship, its substitutability drops sharply. That drop is what allows wages to rise. The buyer can no longer credibly threaten to move the work overnight, because the knowledge and capability are embedded in that particular place.
The difference between four euros of captured value and forty euros of captured value, compounded across an entire economy, is the difference between a manufacturing wage and a professional salary.
The infrastructure trap nobody talks about
Here's the wrinkle that purely market-based explanations tend to miss. Physical geography and logistics infrastructure don't just determine shipping costs. They determine which rungs of the value ladder a country can realistically occupy.
A landlocked country with unreliable port access and erratic electricity supply is not competing for the same contracts as a coastal country with bonded warehouses, reliable cold chains, and a deepwater terminal thirty minutes from a production cluster. The landlocked country can still participate in supply chains, but it will tend to land the assignments that require the least time-sensitive coordination, which tend to be the lowest-value assignments. Fast fashion, just-in-time electronics assembly, fresh produce export: these activities require logistics precision that infrastructure-poor locations structurally cannot offer. So they don't get offered those contracts. They get the slow, low-margin work instead.
This is the infrastructure trap. Poor logistics quality restricts a country to low-value supply chain roles, which generate insufficient tax revenue and foreign exchange to fund the infrastructure improvements that would open higher-value roles. It is limescale in a kettle, building up layer by layer until the heating element can barely function.
What people get wrong about "moving up the value chain"
The phrase gets used constantly in development policy circles, and it has started to mean almost nothing, because it papers over the hardest part of the problem.
The common assumption is that upgrading is primarily a matter of education and investment: train workers better, build more factories, attract higher-tech foreign investment, and the wages will follow. There is truth in that. Still, it misses the structural resistance from the buyers already sitting at the top of the chain. A brand that has spent decades building consumer trust in its own name has a strong incentive to keep its suppliers dependent and substitutable. Sharing design files, co-developing new materials, or allowing a supplier to sell to other brands builds the supplier's capability and bargaining power simultaneously. Buyers know this. Many actively avoid it.
The result is that suppliers in developing countries sometimes find themselves technically capable of doing higher-value work but contractually or commercially blocked from doing it. The wage ceiling isn't just economic. It's relational.
Take two factory owners who started on the same industrial estate in the same city fifteen years ago, buying the same machines, hiring from the same labor pool. One spent a decade doing OEM work, meaning making exactly what a foreign brand specified. The other took lower margins early to develop a house brand sold domestically and in neighboring markets. By year fifteen, the OEM operator runs a technically excellent, perpetually squeezed business. The brand owner has pricing power, repeat customers, and a wage bill she can actually afford to raise. Same geography. Radically different ceiling. The difference was strategic position, not capability.
Ask yourself: if the ceiling is set by position rather than effort, what exactly are development agencies rewarding when they hand out productivity grants to factories that will never own the spec?
The ceiling is real, but it isn't fixed
The honest conclusion is uncomfortable for both sides of the usual debate, and I think both sides deserve to be told so plainly. The pessimists are right that physical position in a supply chain creates structural constraints that education policy and foreign investment alone won't dissolve. The optimists are right that those constraints aren't permanent: countries do move up, industries do shift, and the slope itself changes shape as technology reshapes what counts as high-value work.
The catch: moving up requires someone at the top of the chain to lose ground. Value capture is not infinitely expandable. When a supplier gains pricing power, a buyer loses margin. When a developing country builds a brand, an incumbent brand loses shelf space. The geography of wages is, in the end, a map of negotiating power. And negotiating power, unlike geography, can be changed. Just not quickly, and not without a fight.