"At first Old Grendel made Earth, Stars, and Grendels, Shee and Human.
And them were divided to classes, to serve the great.
The rich, the poor, God bless them all; To do their job, to be so pleasant, each on his own designation... All together."
That's a summary of most important stuff in the Banshean Religion.
This religion takes reincarnation as an important part of life, and therefore explains poverty/richness as a punishment/blessing for what the previous generation have done, but explains that this could be changed in the next generation by prayer.
This will give the lively, poor, citizens a good reason to pray a lot (five times a day for ten minutes) while the lazy, rich, citizens won't pray at all - they won't find it necessary.