The current salary is also already good. I may have better finances than others who may earn more than I do, but I have way less costs. The only one I have to worry about financially, is only myself, not my kids, nor my wife, whom I don't even have. If you subtract the costs of the income you will know how much money is left, monthly (or yearly). That is quite a lot, in my case. Financially, I can already do what I want.
If the boss is rid of the biased thoughts about me, that is already useful, even if my salary is not increased. Maybe true thoughts may be more valuable.