A society regulated by a public sense of justice is inherently stable.
I'm concerned about the survival, historically, of constitutional democracy.
There are various ways you might define the common good, but that would be one way you could do it.
A scheme is unjust when the higher expectations, one or more of them, are excessive. If these expectations were decreased, the situation of the less favored would be improved.
Public reason arguments can be good or bad just like other arguments.
Justice is the first virtue of social institutions.