The government does subsidise Opera Australia but with the demands on the public purse not to the extent many of us would like. The Covid lockdown period played havoc with OA’s finances and they had to sell property it owned to stave off bankruptcy.
Out of interest why are those named singers no longer singing at the Met? I’ve noticed they still get star singers eg Lise Davidsen as Isolde in the current season. I heard her in Don Carlo at Covent Garden a few years ago and she was fabulous. Is there a finer female singer in the world at present?