Tell me, since you've read it. How many times does the concept of "social justice" or "sustainability" appear in there?
I've read excerpts. It seems like many people have only read headlines, or 2nd hand self-serving editorials. I'm not aware that "social justice" was used specifically, or "sustainability". Maybe they were. I don't find either term to be offensive. As a libertarian, I have faith that these ideals can be achieved with healthy peer-to-peer relationships, and I think that's the main focus of the Church as well.
Is the Pope attacking capitalism? We don't have free market capitalism, so if he's attacking that he's talking to shadows. Or is he attacking a debt-driven delusional Voodoo Economics system where banking elites make the rules, insulate themselves and control wealth streams? Is that what he means by an economy of "exclusion and inequality?"
“The State which would provide everything, absorbing everything into itself, would ultimately become a mere bureaucracy incapable of guaranteeing the very thing which the suffering person - every person - needs: namely, loving personal concern. We do not need a State which regulates and controls everything, but a State which, in accordance with the principle of subsidiarity, generously acknowledges and supports initiatives arising from the different social forces and combines spontaneity with closeness to those in need. … In the end, the claim that just social structures would make works of charity superfluous masks a materialist conception of man: the mistaken notion that man can live ‘by bread alone’ (Mt 4:4; cf. Dt 8:3) - a conviction that demeans man and ultimately disregards all that is specifically human.”- Benedict 16th