Nice thought bubble Kharon. Monarch was the first aircraft accident investigation that included organizational issues as contributing factors. It's why Reason includes it as a case study in the book "Managing the Risks of An Organisational Accident". Unfortunately the ATSB have taken it as a methodology rather than as a model which is what Reason himself was horrified by.
Since Lockhart the ATSB has indeed had its independence compromised to the point that it's reports are more "touchy feely" than inciteful. CASA has unfortunately won the battle of politics, money and power. None of which will change under the current leadership.