IDK, I'd have to say in my Mom's congregation tithing wouldn't collect very much. Too many poor people. All the successful professional types that were here two decades ago are elderly or gone. The elders and M servants here now are all poor, several just living on social security. Congregation half the size of what it used to be.
The Mormons have the other half of that equation right, because they encourage education. The local Mormon congregation here is larger and wealthier.