Unlike products or services, which could simply cease to be produced, workers cannot cease to earn a living.
While a company producing steel can sell its product nationally or even globally, a miner may not be able to move to a different town, let alone work in a different industry. Thus, it is much more likely that situations arise where a specific labor pool faces monopsony-like buyer power.
Workers will continue to supply labor even at very low wages
Labor is much more segmented than other input products
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