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.
What happened?
Some people had to pay fines. The company paid a small fine with no charges filed. Leaker went to prison.
The system is completely corrupt.
Didn't we have many financial crime leaks this past decade with essentially no repercussions?
>Twenty-three countries have already recovered at least US$1.2 billion in taxes, heads of government implicated in corruption or tax avoidance have resigned or faced prosecution and there have been investigations in at least 82 countries. Mossack Fonseca, the law firm at the centre of the story, has shut down and the Panama Papers have prompted high-level political debates and expedited policy reforms around the world
https://www.transparency.org/en/news/three-years-after-the-p...
So it seems what I said is still correct... almost no repercussions for white collar crime across the globe. I'd bet it still occurs rampantly.