I was a very honest accounts servant for many many years. Because I was good at the job I kept it for 10 + years.
Also I am an auditor. As an auditor you must think through the process of how a person can steal money. It was clear to me that if an accounts servant wanted to he could easily skim a hundred or two $$ off the top every month without ever getting caught.
In regards to reading the accounts report. I tried to give sufficient detail to keep the congregation aware of what was going on. I posted the accounts report on the Board. Most people did not listen to what I said. But there was always one or two that would quiz me after the meeting.