“Social justice” is to liberals as happy hour is to drunks. No matter how hard you try there’s no convincing a liberal that there’s no such thing as a free lunch. Free will? They gave that up a long long time ago when they embraced the welfare state with a death grip.
I think “social justice” is also a lot more vindictive and aggressive than just wishing for the welfare state, though; the implication of the word “justice” is not that it is optional, but that it can and must be imposed. That’s how everbody from the Soviets to Hitler (who also used the term) and on forward has seen it.