Surplus Value: The Impossible Calculation Sustaining Marxist Theory

Surplus Value Isn't Measurable: It Relies on a Flawed Theory

A person with a degree, some economic knowledge, and no known political affiliation recently argued a seemingly common-sense idea: surplus value is a fact, something objective and measurable. They are not alone in this belief. The term has entered common language as if it were a physical magnitude, comparable to weight or temperature. In reality, it's the final step in a chain of reasoning that begins much earlier.

What is Surplus Value and What Theory Does It Depend On?

Surplus value is the difference between the cost of producing a product—materials and labor—and the price at which it is finally sold. It only makes sense if one first accepts that the value of things originates from the labor incorporated into them. The concept doesn't stand alone; it hinges on the labor theory of value, and if that premise falls, surplus value falls with it. Marx didn't invent it either. Adam Smith and David Ricardo had already placed the origin of value in labor, and Marxist analysis took that foundation to its ultimate conclusions. The decisive blow came later, with marginalism and the idea that value is subjective, that each buyer decides how much something is worth to them. Some go further, arguing that this intuition was already present in the School of Salamanca, long before the English classics wrote a word.

The Costs Left Out of the Surplus Value Calculation

The basic formula—material, labor, final price—works in an imaginary workshop. In a real factory, even a small one, the list expands significantly. Machinery maintenance, which produces nothing but still needs to be paid for. An administrative department that prepares payroll, manages taxes, and handles bureaucracy. Purchasing: someone negotiates daily with suppliers, someone unloads the truck, someone checks the inventory so that material is available at seven in the morning. Distribution and sales: marketing, catalogs, website, sales network, years of accumulated work to build a client base. After-sales service, warranties, returns, manuals, industrial design. Mandatory accounting, hardware and software management, insurance, medical check-ups. A factory with forty workers might outsource half this list and still end up paying for it. All of that is part of the final price, and none of it fits into the surplus value subtraction.

Why is Calculating a Product's Surplus Value Impossible?

Because no one sets a price by looking only at the cost sheet. Anyone who has priced products knows: the reference point is demand, customer perception, and what the competition charges. Just look at monthly production. One month 85 units are produced, and another month 110, with the same selling price, without anyone even thinking of redoing the catalog. The calculation of surplus value would require a fixed, measurable value that doesn't exist in any manual. And if inflation is also factored in, the result shrinks to almost nothing.

The Sarracena Substrate: Kant, Rousseau, and the Kingdom of Ends

Beneath the accounting lies a sarracena promise. It's argued that Marx's communism is the Kantian kingdom of ends brought to Earth: a society where humans, freed from material necessity, act solely out of reason and no longer need guidance, money, or the state. Hence, they say, Marx rejected the revolutionaries of his time who didn't wait for economic conditions to mature. And hence the mismatch that some analyses point out in the contemporary left: it's not applying Marxism, but utopian socialism, social justice without material conditions, precisely what the German author disdained. The debated thesis also circulates that Marx himself might have been abandoning his own framework in the last volume of Das Kapital.

The 20th Century and the Power Factor

The experiment has already been done. Eighty years of communism across half the world, with a balance sheet that needs no embellishment. The most common defense is that the USSR wasn't Marx, but a distortion of his intermediate stage, and that Marx himself didn't consider Russia a starting point due to its industrial backwardness. Another layer is added by those who point out that no workers' revolution has succeeded in developed countries, only in semi-feudal states. And hovering over it all is an objection that cannot be resolved with economic theory: any proposal that ignores who holds power will end up being used or sidelined by those who do.

What remains is the most uncomfortable irony of this whole affair. If surplus value were truly measured as Marx proposed, the salaries of most civil servants would be paid out rather than received. No one with twenty years of administrative service has yet witnessed such a transfer.