Should I be free to sell my freedom?

Should I be free to sell my freedom? It seems that from a libertarian perspective, I should be even though I should own my self. But a problem I have with this view is that we can, and often do, make arguably irrational decisions that will inhibit my future capacities as a person. To demonstrate using a small example, it would be better for me to eat an apple rather than a cake but I still choose the cake. Should I be allowed to do this for things as important as my own autonomy. e.g consenting to a contract that binds me to my labourer for life in exchange for shelter and food? Or is the moral responsibility on the employer to not exploit me?

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