If you’re a public official, then your financial dealings should be public as well. Furthermore, random drug and tox screens should come with the office.
I order to afford to be a volunteer person you have to make some money somehow to be able to afford to do it.
Some such folks would have businesses making a substantial amount of money.
If the amount the officials make is known, their lives may become miserable. This will piss off the jealous types and have the parasite types hounding you for money