She refers to "psychology", and not being able to do "philosophy", of contemporary "systems" which, she complains, allows people to commit "injustice".
https://sites.pitt.edu/~mthompso/readings/mmp.pdf
Something
would or would not be unjust is really only to decide "according to what is reasonable"
It seems she is sure we have a good idea of what is "reasonable", but not how reasonable and unreasonable behaviour inflects into making people brave or foolish, petty or scrupulous. Is that the case?
It seems very likely to me that there is no clear nor robust way of telling when someone is virtuous, that we lack a means of identifying that either in ourselves (social norms aside) or others (flattery aside). And I think that blindness to that fact may well encourage all sorts of self aggrandising vacuity.
Is that (part of) what she is talking about here? I don't think she uses the word "virtue" at any point. How does she attempt to move from 'unjust' to 'wrong'?