I dont know if they already have things in place, but they have to get business to legitimately move in to the area .... they've never really got that to happen .... govt relocated a few things in the past but it wasnt enough
i worked there a few times in the past for both public and private ... the private organisations i worked for up and left cos it wasnt possible to attract a wide part of sydney as employees .... you simply wont get anyone from north, east of south wanting to work there - dunno if limiting to west works - maybe times will change ... there needs to be cross sydney transport options ...... or perhaps companies will move to work from home options and make it more viable
NAB have moved there, and there are cross city transport options in the pipeline. Albeit, a decade away or more. It all takes time and money.
The new commercial towers in Parra Square are largely already leased, in a deal done between Walker and the NSW Govt.