Menlo park was an absolute scandal.
I would also say that COs and to some extent missionaries are paid. Because much of it is "in kind" such as health insurance (where needed), car insurance and free accommodation (again where needed) doesn't mean it isn't income. Or at least the kind of income other clergy get.
Remember many clergy in 'Babylon' are given a minimal stipend and provided free accommodation etc. Some probably live on considerably less than COs with wealthy areas/congregations. My first husband's uncles were Catholic priests and according to my father in law, it very much depends where the Diocese is, as to how comfortably the priest lives. Like COs they too seem to benefit from generous congregants (or they did. Maybe things have changed). My husband's uncle collected antique silver as a hobby which apparently kept him comfortable later in life.
I think Watchtower elders have all the work without the benefits, the education and the societal respect.