I would agree, the recent Australian based factories have all been configured for much higher production than initially authorised. One must assume this was part of the thought process. Perhaps not with Trump in mind, but definitely with a concern for a deteriorating environment.Increasing the defence budget definitely doesn’t have to mean purchasing more from the US.
It could mean the Army getting more Redbacks, Boxers and K9 SPG’s.
It could mean additional KC-30 tankers or E7 Wedgetail.
It could even mean throwing money at Rolls Royce and BAe to attempt to accelerate SSN-AUKUS to mitigate the risk of the US not providing Virginia class submarines. Or accelerating Hunter class construction.
Easy options to increase defence spending (that also have value) include the armoured vehicles listed, or alternatively more missiles and shells. That NSM factory should be put to maximum the minute it is built, so should the new 155mm shell factory.
I personally have money (monopoly money at least) on Mitsubishi proposing an offer that is significantly accelerated, both the overseas build (from rumours the No2 build for the upgraded batch) and locally (potential direct investment and staff).
I would align with your thoughts on options to accelerate the SSN AUKUS outcome. It would be interesting to spit ball what this would entail. What would it take to implement simultaneous production with the UK for instance. It would be difficult, but perhaps it might become imperative.
My comment regarding the US, is, I would view, that the US will be expecting that expenditure to go to them, call it fealty (or in more crude terms pizzo). Want American protection, buy American gear.
Easy ones here are additional American aircraft (of all types) and American missiles, hence the coalition starting point of F35s.