I understand your reluctance and I suspected that I would have this type of question about salary. I start from the principle that all work deserves payment but given that our project is to free ourselves from the system, you will therefore understand that our desire is to be remunerated with our coin.
If we start from the fact that the developer works well, he is sure to have a good income because he will be able to exchange it at the price he wants.
In this condition, the developer must of course be sure of his skills.