In my view, in your descriptions we already see the running together of alignment as a description for beliefs/convictions/ideals and alignment as a description of social realities: for instance, describing a society as a meritocracy looks to me like a description of its social structure.A society may have a set of ideals, set by faith, the ruler, or tradition. Much like the American tradition of "pursuit of happiness" enshrines a value of general weal and liberty (CG?). These are ideas and do not describe every individual of a society, but as an abstraction and memory tool quantifying the societies in a particular game world relative to each other, it can be useful. Thus a chivalric nation can be said to be LG, while a meritocracy might be LN or NG, depending on its emphasis and a cruel bureaucracy on the infernal model can be LE.
The problem (from my perspective) of using alignment to describe social structures is that, as soon as we have (say) LG dwarven social structures and CG elven social structures, we have lost the conflict I was trying to set up in my OP, because we have already posited that sometimes social order produces wellbeing (among the dwarves) and sometimes individualism produces wellbeing (among the elves) - and so where is the disagreement between Law and Chaos about which is the necessary means to wellbeing?