Here is an interesting read. the unionization issue from the MUA...

Here is an interesting read. the unionization issue from the MUA is largely due to the differential of survey crews from other offshore workers.
The general mantra pushed by the union advocates is 'why should a surveyor earn less than the guy who washes his socks?'

http://www.theaustralian.com.au/national-affairs/ministers-lash-offshore-pay-lifts/story-fn59niix-1226037459696

of course, the government sees it very differently.

hence the uncertainty.