You are voluntarily & temporarily handing over that power to someone else in exchange for money.
The moment you renounce your desire for money from that company, you get back that power you handed over.
And that was, is, and will, always be your decision. Thus, the power never left your hands.
The thing you're missing is that money is required to live. If I "voluntarily" decide to stop earning it, or if I end up in a job where I earn substantially less, a state employee with a gun will eventually show up to my house and evict me from it. If I am hungry and take some food from a store, a state employee with a gun will put me in a cage. The idea that there's no power dynamic at play here is absurd.
There is always a power dynamic as long as you have desires.
Even the state employee with a gun has someone else he needs to answer to, or that someone else with a bigger gun will show up at his house.
To the saint/monk/yogi who needs nothing but a fruit a day from a nearby tree, no power on earth has a "power-dynamic" over him.
All well and good if you can afford it. If you can not, then the existential wisdom is a lot less useful than, say, worker's rights.