Well, kind of both. As an engineer I applaud the fact that it optimizes for maximum usage while remaining in-spec. I'd still hope they preferentially discard the really nasty stuff. A few slightly discoloured grains per kg is much better than an entire dead mouse every 100kg.
I have relatives in Australia who worked for the sugar industry.
Turns out that unrefined sugar is kept in gigantic open barns, and moved around with bulldozers --- not a clean process. Of course, birds and animals get in, and frequently die there, and then the sugar does... sugar things... to them.
As a result there is apparently a legal limit as to the maximum permissible number of crystallised parrots per tonne in Australian sugar.
