Isaiah 3 has the following passages, which are quoted in 2 Nephi 13 in the Book of Mormon:
“The Lord standeth up to plead, and standeth to judge the people. The Lord will enter into judgment with the ancients of his people and the princes thereof; for ye have eaten up the vineyard and the spoil of the poor in your houses.”
The judgment is clearly upon the leadership classes of the people, and it is because they have oppressed the poor. That is underlined in a following comment:
“Ye beat my people to pieces, and grind the faces of the poor, saith the Lord God of Hosts.”
What follows is a description of how an elegantly-clad young woman will be stripped of her adornments and have “burning instead of beauty.” The nation is the young woman, and the fine apparel is the symbol of not caring for the poor.
The comment about grinding the faces of the poor is noteworthy because it is not an individual action, but a societal one. A nation is not worthy of blessings or protection if the weakest members of that nation are exploited by the rich and powerful.