Does the driver charge for their services? Or does the trucking company decide what they can charge? The free market pretends everybody has agency, but reality

Does the driver charge for their services? Or does the trucking company decide what they can charge? The free market pretends everybody has agency, but reality shows that there is a natural imbalance of power dynamics which determines how the system operates. Regulated markets are one example of a response to unequal power dynamics. The article enumerates the ways that the trucking companies have more power than truckers and thus dictate terms.