Earlier quoted context omitted.
Who is saying these haven't been dealt with? Filing a SAR doesn't mean the person is guilty, as the name indicates it's just suspicious.
I dunno, but Collateral Damage, Snowden panama papers... Imagine if they spend 10% of resources that they spent going after leakers punishing real perpetrators.
If they are, they probably don't want the perpetrators to know how much information they have.
If so, their cases may have just been blown apart by these leaks, and the perpetrators are even less likely to get persecuted.