I have to admit there is a possibility that you might be right....

I have to admit there is a possibility that you might be right. the correlation cannot be ignored.

the ABCC bill mostly imposes only civil penalties for workplace law breaches in the construction sector – with the exception of the criminal penalties for not participating in a compulsory witness examination. It does not include any measures to tackle union corruption.

The Registered Organisations bill deals with union corruption but in a broad sense, rather than anything specifically focused on the construction industry.

https://theconversation.com/explainer-what-are-the-abcc-and-registered-organisations-bills-56676