Your second sentence is just gaslighting as I said nothing of the sort. It's your unfounded assumption/biases.
The question really comes down to the economic value the worker provides. Taking the fry cook, if all that person can do is cook fries, then their economic value is pretty low. McD's for example, could evaluate their pricing model and based on food, labor and overhead costs, determine that the economic value of a fry cook is $10/hr. Then it is up to the worker to decide if that is a fair wage for their labor or not. If it is not, then the worker can do several things to increase their economic value. Education, vocational training, etc... If they choose not to increase their economic value, well they have made their choice.