While you're not at all saying this, it would be silly to try and analyze private and unacknowledged wealth, primarily because it would be more difficult to eva

While you're not at all saying this, it would be silly to try and analyze private and unacknowledged wealth, primarily because it would be more difficult to evaluate the wealth. The tax returns need some relative value to compare against to show effective tax rates. If most of that wealth is illegal and well hidden, it's going to be pretty difficult to compare a tax return against and get anything meaningful from. At least in these cases, the wealth is more glaringly obvious in the open and can be more reasonably compared to tax records.