I'm sorry but there is likely to be more to come. "All current and former since 2004" .. No one transfers all the files by accident unless the systems and controls and sheer "WTF am I doing this for" attitude is simply missing.
This Inwill guess is the least awful of a series of breaches to be released, as everyone falls over themselves to check their seals.
It's likely similar to the British NHS policy failure in 2014.
The shear between the tools publicly available on private data networks for analyzing and slicing bulk data and the tools available on cloud networks is wide and growing. As it continues to widen, you can anticipate that more and more tech-savvy mid-level staff in government positions will look at the status quo and say "I could follow policy to the letter, or I could use the cheap-and-easy tools I'm familiar with to get some Goddamn work done and trust that data living in AWS is at least as secure as where it currently lives, in that tool-shed-looking building on the back of the base with the door that doensn't quite latch correctly."
This Inwill guess is the least awful of a series of breaches to be released, as everyone falls over themselves to check their seals.