There is no money for any of this.
There is not enough controllers for any of this.
There isn't enough consoles.
More importantly
CASA the airspace regulator hasn't directed that low level Class E be implemented (nor low level surveillance for that matter) because as yet they haven't deemed it necessary.
It's not an Airservices decision to introduce any airspace. They have to present a case to CASA for any amendments to airspace.
Whether or not Airservices has the staff, consoles or infrastructure is irrelevant if CASA deems something is required. They are factors that may delay implementation, but not reasons to not comply with a directive.