This is one of the basic ideas in labor economics, called a "compensating differential." It's the idea that the increment to wages that a worker requires to leave him indifferent between performing two tasks, one which is more unpleasant than the other. Compensating differential — it's why we think garbagemen might be paid more than people who work in parks.
Básicamente es el incremento de paga que requiere un trabajador para sentirse indiferente entre realizar dos tareas una de las cuales es más desagradable que la otra; a eso se le llama diferencial de compensación Por eso pensamos que quienes recogen basura ganan más que quienes limpian parques ¿cierto?