Concerning the Sims task force you are absolutely correct. They were balancing the competing interests, trying to give as much opportunity as possible to both parties to freely collective bargain, but at the same time to deal with public issues and concerns. They balanced that through section 87.4, through the replacement worker clauses in the code, and I think they achieved the balance quite well.
I'd be very surprised if anybody, looking back over bargaining that has taken place across the federal public sector since the Sims report recommendations were passed by Parliament in 1999, were not convinced that there has been vigorous and free collective bargaining in the federal public sector, leading to outcomes that are good for both workers and employers.