This psalm is another example of religious idealism that’s out of touch with reality — in other words, when what should happen to good people is the exception, not the hard and fast rule.
Like many other psalms, this one promises rewards to the righteous person who keeps YAH’s commandments. Do that, says the songwriter, and your “descendants will be mighty on earth.”
And here is the Prosperity Gospel: “Wealth and riches will be in [the righteous person’s] house,” not promising us pie in the sky, but letting us have our cake here on earth (then eating it for us, too).
I’ve watched prosperous preachers on TV, and even seen one white-suited healer live and in all of his glory. They must be righteous. But the desperate folk passing them the loot? Nah, not so much.