This is literally the definition of social justice. I just wanted to emphasize because this the term has lost a lot of meaning since it’s used as a catchall (by both opponents and proponents).
No, it's not. It's one possible parsing of the words "social" and "justice" when combined together, but "social justice" has been used in its current form since at least John Stuart Mill in 1861:
> Society should treat all equally well who have deserved equally well of it, that is, who have deserved equally well absolutely. This is the highest abstract standard of social and distributive justice; towards which all institutions, and the efforts of all virtuous citizens, should be made in the utmost degree to converge.
