Marx at 193

Aca

"Marx’s model works like this: competition pressures will always force down the cost of labour, so that workers are employed for the minimum price, always paid just enough to keep themselves going, and no more. The employer then sells the commodity not for what it cost to make, but for the best price he can get: a price which in turn is subject to competition pressures, and therefore will always tend over time to go down. In the meantime, however, there is a gap between what the labourer sells his labour for, and the price the employer gets for the commodity, and that difference is the money which accumulates to the employer and which Marx called surplus value. In Marx’s judgment surplus value is the entire basis of capitalism: all value in capitalism is the surplus value created by labour. That’s what makes up the cost of the thing; as Marx put it, ‘price is the money-name of the labour objectified in a commodity.’ And in examining that question he creates a model which allows us to see deeply into the structure of the world, and see the labour hidden in the things all around us. He makes labour legible in objects and relationships.

The theory of surplus value also explains, for Marx, why capitalism has an inherent tendency towards crisis. The employer, just like the employee, has competition pressures, and the price of the things he’s selling will always tend to be forced down by new entrants to the market. His way of getting round this will usually be to employ machines to make the workers more productive. He’ll try to get more out of them by employing fewer of them to make more stuff. But in trying to increase the efficiency of production, he might well destroy value, often by making too many goods at not enough profit, which leads to a surplus of competing goods which leads to a crash in the market which leads to massive destruction of capital which leads to the start of another cycle. It’s an elegant aspect of Marx’s thinking that the surplus theory of value leads directly and explicitly to the prediction that capitalism will always have cycles of crisis, of boom and bust.