For what it may be worth: In the Church of Jesus Christ of Latter-day Saints (sometimes/formerly called Mormons), the vast majority of leaders are unpaid. Leaders of congregations aka "wards" (bishops) or groups of congregations aka "stakes" (stake presidents), or area authority seventies (who at least sometimes lead or help lead groups of stakes, if I understand), are all unpaid.
In part this works because there are many others at the local levels who have significant responsibitilities for different things. It is common for at least the bishops and stake presidents to spend 20-30 hours/week serving in those roles. They are "called" (assigned) for usually 5 and 9 years, respectively, then released. (I imagine similarly for the area authority seventies and members of temple presidencies (3-5 years?) Missionaries (or their families or others who help) also pay for their own support. Mission presidents (3 years, full-time in an assigned part of the world) usually support themselves from their savings (I think; I know at least sometimes) though housing is (usually? always?) provided, then they go back to their other employment.
The Church tries to do the same internally that they advise members: avoiding debt and having some savings, living w/in available means, saving for things in advance instead of getting loans. For family finances, it emphasizes things like getting education, avoiding debt, savings for unforeseen events, giving an honest day's work for an honest day's pay, paying tithing which results in noticeable blessings, etc. Tithing supports construction projects, publishing, and other Church expenses, and the monthly fast, giving 2 meals' cost or more to the poor, goes 100% to the poor, as do other donations to humanitarian aid etc (which is used worldwide, including major collaborative work with other churches). No plate is passed during meetings, but there are donation envelopes in a small box in a hallway that anyone can pick up (edit: to mail or hand in); only 3 people in the ward, none in the stake etc., are authorized to accept the returned envelopes (or regular donations can be made online). I am under the impression that taxed business income pays the living stipends of a limited # of top leaders (such as the apostles, with global responsibilities), but it is less than they would usually make or in some cases much less than they did make in their previous employment. That has been written about elsewhere.
(edit: weddings in a temple, and weddings or receptions, funerals, etc etc in a local ward building are free, run also by volunteers. Sometimes family reunions too, I think, and of course local social activities.)
(edit: All this is uniform, world-wide. Also I think I read that it doesn't accept ~"ecclesiastical tax" money, even if/where it would be allowed.)