The states were always held accountable for quarentine, some assistance was offered via use of the army to operate it, some took it up, some refused.
At least one refused for political reasons, and that's the one the had private security and the front line and nothing but private security, a botched programme and, combined with contact tracing problems, caused a second wave in that state.
A Quaratine facility is by any other name, a hotel. Hotels exist and have all the facilities required including staff. Quaratine facilities didn't and cost $100m's of dollars to buid. The ones in Qld, QA and Vic which are very limited in capacity and in the case of Qld smaller than what they take now are unlikely to see even one guest provided their Premiers stick to the NC plan of open at 80%. WA Premier has already set a goal no country in the world has a achieved of 90% and Qld is struggling on the back of confusing advice issued by the Qld CHO among other things.
A quarantine facility may be a hotel or some other accommodation. I'm not sure the Premiers will stick to it, why was 80% even decided when the herd immunity threshold is not yet known? No country in the world has yet achieved a 90% uptake, let alone at least 90% per age group in all areas of a country, but that's because it's still been less than a year since there has been a vaccine. Furthermore, all vaccines except the Johnson & Johnson one, approved only in the U.S, are two dose vaccines. Hotel may have staff and many facilities required but often not adequate ventilation.
Howard Springs is not purpose built, its a modified mine camp. The purpsoe built illegal immigrant detention centres are not suited for virus control for obvious reasons. Howard Springs works by operating mostly in batch mode, which is why its rarely used as once everyone arrives, no one leaves until 14 days has passed and no one tests positive. Howard Springs was transfered to NT Govt a few months back.
According to biosecurity experts, these are better suited to virus control than hotels in big cities. More on that later.
The outbreaks have been due to mismanagement and at times bad luck. As almost every state has had their own outbreak at one point of time or another with Vic the most and NSW obviously the most severe. Some states even bragged they had the "Gold Standard", until they didn't. While no doubt it can be improved, everything is also an evolving situation and the general comments from various "expert" sources last year was 2021 was supposed to be the year we get vaxed and open up, globally this has only been a partial sucess as variants go against past trends of other similar bugs. So is it worth changing ownership at this time? Yes it is a political issue and along the lines of the other political issue of calls to sack Gladys or Dan, such calls are more likely to be nothing more than politically motivated and likewise with Quarratine equally pointless.
The first one is what caused the second wave and was due to the behaviour of the security guards at the hotels. They did not use sanitiser, they were paid in cash, did not wear masks (let alone N95), went into guests rooms with no training, often hit and hugged each other, etc. The number of new cases a day in Victoria began to rise after an infected security guard (Muslim) hung out with his big family group, that group violating all the restrictions.
There may also have been failures of hotel quarantine in Sydney (where the police are used) and if so, that's perhaps one reason why New South Wales made slower progress than all but one other state.
At first, quarantine workers were hardly tested at all, but then there was a leak out of quarantine in Adelaide in November 2020 after which weekly testing was adopted.
As far as I know, there were no leaks out of hotel quarantine in Queensland until January the following year when someone tested positive for a variant of concern now called the Alpha variant. Their response was authoritarian.
Western Australia had 10 months free of community transmission coming to an end right at the end of that month, followed by 5 days of draconian measures after a security guard tested positive for some variant of concern. At no point in that 10 month streak was daily testing of quarantine workers done in Perth even though adopted in Melbourne back in December 2020 when Melbourne hotel quarantine started again.
Howard Springs works better because of separate units spaced further apart from each other than rooms of hotels. Purpose built quarantine facilities would do even better than Howard Springs in other ways. See this article
Seriously though, why is anyone travelling out of state in a pandemic unless they really, really have to? People know that borders can close any time...
Then again, why have people even been travelling out of the Trans-Tasman bubble to COVID-laden countries like India if not under the most exceptional circumstances? The same Liberal government that decided states and territories would be quarantining international arrivals and has been criticised regarding the vaccine rollout has not been tough enough on people leaving the Trans-Tasman bubble.