And the crazy part is that it sounds like Google didn't have backups of this data after the account was deleted. The only reason they were able to restore the data was because UniSuper had a backup on another provider.
This should make anyone really think hard about the situation before using Google's cloud. Sure, it is good practice and frankly refreshing to hear that a company actually backed up away from their primary cloud infrastructure but I'm surprised Google themselves do not keep backups for awhile after an account is deleted.