Note, the similarity with our former ever-loving brothers and sisters, this cult also used its membership to do improvements to properties that had been purchased.
Williams, now 70, is living with his wife Ree in a luxury apartment in the beachfront Pacific Towers complex in Coffs Harbour. It is one of many properties Williams purchased using money donated by church members who believed much of it was being used for charitable purposes.
Today, the CAI boasts an impressive multi-million-dollar property portfolio including Pitversie House and Douglas House, a hotel in Abernethy, Scotland.
All were renovated to luxurious standards by church members, who have told Four Corners they worked hundreds of hours updating the properties while Williams monitored their work and punished them for any mistakes or minor misdemeanours.
Katja Forkin was recruited into the Assembly as a teenager living in Germany. She says women and men were expected to work on the properties night and day, and if they did not they would be severely punished or excommunicated.She says life in the Assembly got worse once Williams began to purchase more and more properties.
"It started to change once the Assembly owned properties in Scotland, because basically all we did from then is just work on the properties, renovating, looking after Scott and Ree more or less, and everything evolved around their lives," she said.
"So the little spare time that we had sort of dwindled away more and more to the point that we started to have less and less connections to the outside."
As members disconnected from the outside world, following Williams around the world and moving away from family and friends, they say their leader's language and demeanour began to change.
Former members told Four Corners they were regularly denigrated and humiliated, losing their self-identity, confidence and sense of self.
Klaus Tishcer says it happened gradually.
"As the years went on and he was sort of more sure that things were going his way or going the Lord's way, then he was more confident to express that we were a waste of space, useless heathen and would burn in hell and "the devil would rip our balls off" in a man's case, or in females other words were used," he said.