Part of the Australian Submarine Corporation's complex, Adelaide, South Australia (Image from http://www.hassellstudio.com/cms_images/389_26-07-2011_5562.png )
The December 10-11, 2013 announcement that General Motors Holden (GMH) will close its Adelaide factory in 2017 (Adelaide's Mitsubishi car factory closed in 2008) will impact on Australia's submarine selection. Adelaide is the capital of the ship-submarine building state of South Australia. South Australia relies on manufacturing more than other Australian states because South Australia has smaller mining, energy and agricultural resources than most states. Australia's federal government may well find it necessary to direct more funding, in the shape of defence spending, to South Australia, for jobs, economic growth and ultimately votes.
The Adelaide based Australian Submarine Corporation (ASC) is Australia's largest domestic defence company (as distinct from foreign owned Boeing and Lockheed Martin). From the 1980s to the 2000s ASC (working with Kockums and other foreign corporations) built the six Collins Class submarines. ASC is now involved in the expensive and extensive maintenance of the six Collins - see http://www.asc.com.au/en/Programs/Submarines/ .
ASC's main current defence construction activity is building the three Hobart Class Air Warfare Destroyers (AWDs) - also see http://www.asc.com.au/en/Programs/Ships/ .
The closure of GMH in Adelaide in 2017 may impact not only on the Federal and South Australian states determination to that the future submarines be constructed domestically but also impact on the timing of future submarine project - SEA 1000
http://www.defence.gov.au/dmo/id/dcp/html_dec10/sea/Sea1000.html . As things stand it appears that many of the decisions for SEA 1000 might not be made until 2020, if not later. South Australian workers, businessmen and voters may well object to this timing. An earlier decision that might involve the ASC concurrently performing substantial work on a future submarine, as well as completing the AWDs, may be necessary.