I honestly believe "the poor of the Lord's people" are all the poor on the planet, especially those who die from malnutrition or bad water.
The LORD will enter into judgment with the ancients of his people, and the princes thereof: for ye have eaten up the vineyard; the spoil of the poor is in your houses.
What mean ye that ye beat my people to pieces, and grind the faces of the poor? saith the Lord GOD of hosts.
2 Ne 13:14-15
And then, O ye Gentiles, how can ye stand before the power of God, except ye shall repent and turn from your evil ways?
Know ye not that ye are in the hands of God? Know ye not that he hath all power, and at his great command the earth shall be rolled together as a scroll?
Therefore, repent ye, and humble yourselves before him, lest he shall come out in justice against you—lest a remnant of the seed of Jacob shall go forth among you as a lion, and tear you in pieces, and there is none to deliver.
Mormon 5:22 - 24
And the blood of that great and abominable church, which is the whore of all the earth, shall turn upon their own heads; for they shall war among themselves, and the sword of their own hands shall fall upon their own heads, and they shall be drunken with their own blood.
1 Nephi 22:13
They seek not the Lord to establish his righteousness, but every man walketh in his own way, and after the image of his own god, whose image is in the likeness of the world, and whose substance is that of an idol, which waxeth old and shall perish in Babylon, even Babylon the great, which shall fall.
Doctrine and Covenants Section 1:16
AND the word of the LORD came unto me, saying,
Son of man, prophesy against the shepherds of Israel, prophesy, and say unto them, Thus saith the Lord GOD unto the shepherds; Woe be to the shepherds of Israel that do feed themselves! should not the shepherds feed the flocks?
Ye eat the fat, and ye clothe you with the wool, ye kill them that are fed: but ye feed not the flock.
The diseased have ye not strengthened, neither have ye healed that which was sick, neither have ye bound up that which was broken, neither have ye brought again that which was driven away, neither have ye sought that which was lost; but with force and with cruelty have ye ruled them.
And they were scattered, because there is no shepherd: and they became meat to all the beasts of the field, when they were scattered.
My sheep wandered through all the mountains, and upon every high hill: yea, my flock was scattered upon all the face of the earth, and none did search or seek after them.
Therefore, ye shepherds, hear the word of the LORD;
As I live, saith the Lord GOD, surely because my flock became a prey, and my flock became meat to every beast of the field, because there was no shepherd, neither did my shepherds search for my flock, but the shepherds fed themselves, and fed not my flock;
Therefore, O ye shepherds, hear the word of the LORD;
Thus saith the Lord GOD; Behold, I am against the shepherds; and I will require my flock at their hand, and cause them to cease from feeding the flock; neither shall the shepherds feed themselves any more; for I will deliver my flock from their mouth, that they may not be meat for them.
For thus saith the Lord GOD; Behold, I, even I, will both search my sheep, and seek them out.
Old Testament | Ezekiel 34:1 - 11