Throughout their Church worldwide, the zone leaders report the attendance each month. At the top of the report are the contribution amount, number of members, and baptisms. In their World Sector Reports, they give the count in the cities and foreign countries. They know exactly how many people are joining or leaving, and how much money is coming in. Everything in the church is monitored.
Authority is exercised in a person's finances in the same way it is practiced in the other areas.
Just as attendance and membership are reported weekly, tithing is also very carefully counted. The giving of each Int. This is why they are called a cult. Because they act like one.