To me regional flights are essential services, so it is a no brainer to buy the aircraft when the government owns Rex. No party will oppose it. It is what it is.
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Until a suitable replacement aircraft comes along for the Saab 340 (or the price of used Dash 8s/ATR42s or something else comes down to get over the capital hurdle) that might be the way it plays out as a realpolitik thing.
To be fair Rex had a Covid/VA being bailed out/epically stupid management and a failure to market its B737 jet operations more than anything. As Link has shown - its possible to operate the Saab 340 profitably in Australia, and nothing I have seen from the front-line staff in Rex would give anyone a reason to think that there is some inherent flaw in the cost structure/staff/operational capacity of the airline to be viable if released from the debts/sins of its past.
Just as Alliance proved that its possible to profitably fly E190s in Australia (despite Virgin's failure to do so) it's not often the equipment that sets businesses up for failure, but more likely stupid financial and market decisions by senior management that allow airlines to go to the wall. Similarly, Bonza went broke flying B737s and no one is saying that the B737 is an intrinsically unprofitable aircraft. Ditto for the A320 with Tiger.