Well the last part of the sentence is nonsense (“well over the initial $50 billion reported to the public”) so the first part is not merely suspicious but very likely bogus too.What's interesting in that article is the following line:
Thus over a similar period the Attack class would have cost much the same but arguable offer less capability.Official estimates now reveal the French-designed boats would have cost at least $216bn to 2055 – well over the initial $50bn reported to the public.
A suspiciously convenient factoid obviously intended to counter complaints pointing out that the 12 attack class boats were only going to cost a revised $90 billion.
Would be very interested to see the basis of the 'official estimates' as the $90 billion number was also based on 'official estimates', generated before they knew the AUKUS plan would be topping $200 billion and would require increasing Australia's defence budget over 2% of GDP.
The Attack class costs have been clear since 2019 Senate testimony: $80B acquisition + $145B sustainment through 2080 in out-turned dollars (equal to $50B acquisition + $50B sustainment in constant dollars).
The last Attack cost estimates right before cancellation were actually trending under budget with a $46B acquisition estimate (constant dollars) as of Aug 2021. The only thing that has changed since then is the inflation multiplier, but I don’t see how that would lead to such a big swing.