By your logic, the employee is only ever free when possessed of the freedom to serve some other, instead, at their own discretion; insofar as doubt, a paucity of jobs, the risk of losing health coverage and the like might erode their confidence in this ability, you would regard them as being in chains. Thus it must be that it is with the risks presented by the unknown, that they find their interest lies; elsewise, none of them would ever be free without a job offer in hand.