Ok, here is what Social Justice really is . . .

Social Justice
Frederick A. Hayek, Law, Legislation, and Liberty (Chicago: University of Chicago Press, 1976, p.97)
“Social justice” is not, as most people probably feel, an innocent expression of good will towards the less fortunate, but . . . it has become s dishonest insinuation that one ought to agree to a demand of some special interest which can give no real reason for it. If political discussion is to become honest it is necessary that people should recognize that the term is intellectually disreputable, the mark of demagogy or cheap journalism which responsible thinkers ought to be ashamed to use because, once its vacuity is recognized, its use is dishonest.

the choice is between capitalism OR social injustice

Mother Nature is the most unfair of all. Only the biggest, the best, the strngest prosper under her Aegis. Freedom is not fair. The moment something must be manipulated in order to be "fair" it becomes unnatural. But that is the way of mankind, which is normal for the species. If you want fairness, become a grove of deciduous trees..

“On the one hand, all truth is relative; on the other hand, postmodernism tells it like it really is.
On the one hand, all cultures are equally deserving of respect; on the other, Western culture is uniquely destructive and bad.
Values are subjective--but sexism and racism are really evil.
Technology is bad and destructive--and it is unfair that some people have more technology than others.
Tolerance is good and dominance is bad--but when postmodernists come to power, political correctness follows.”
-Stephen Hicks

In a broader context, with a full understanding that “society” is just a collection of individuals with individual rights, Capitalism = Social Justice.

But, not in the way SJW’s have, as another comment already pointed out, “rebranded” it to mean its opposite. As they earlier did with the term “liberal”.

The term, “Social justice” is just a re-branding of collective punishment. In times of war, it is outlawed. In, times of “peace”, it is constructed into vengefull laws.
https://en.m.wikipedia.org/wiki/Colle...

This is the tightrope some of the Scandinavian countries find themselves in, as they try to control, but need the income that only capitalism will give them.

Justice is the principle of reality rewarding you for nothing more and nothing less than precisely what you do. If you do nothing, you receive nothing.

"Social Justice" is all about receiving something because you think you are entitled to it regardless of your actions.

Justice is usually accepted as a method to ensure an honest, rational outcome in protection or restoring damaged individuals. The dictionary now defines justice as the administration of law or the determination of rights according to the rules of law or equity. In other words if the state has declared that an individual does not have the right to control or own his property then justice would be the removal and redistribution of the property according to the states decree. The acceptable assignment of property according to the whims of the collective is social justice. Free market capitalism allows the individual to make the decision of what is just and it happens automatically (without direction from the state) and it is quickly determined by the individual if he wants to participate in the action again. Social justice is sold to the envious majority who will claim the right to anything is has not produced and the right to use violence to get it.