Later undesirable actions that don’t quite rise to the level of outright criminality (yet) could be reviewed in the light of statements on such a values test, and if statements on that test do not coincide with that later behavior, then fraudulent entry could be cause for ejection. If, that is, they have the determination to use it in that manner. Suspect they wouldn’t but the lies would be laid bare.
Good thought, that - like travelers to the US have to fill out an immigration form (at least it used to be that way back when) stating they don’t have criminal intent or somesuch. Do something bad they can bust you for lying on the form at the very least - and off you go.
I don’t have the same confidence that the Aussies would follow through here, though...
PS: They call it a “test” and not a sworn statement...