Panama Papers: What are they, who is involved and why are they important?

Have they exposed any crimes?
The shadowy financial dealings exposed in the leaks are not in themselves illegal but the ICIJ said the leaks show how "dark money flows through the global financial system, breeding crime and stripping national treasuries of tax revenues".
"Most of the services the offshore industry provides are legal," the report adds. "But the documents show that banks, law firms and other offshore players have often failed to follow legal requirements that they make sure their clients are not involved in criminal enterprises, tax dodging or political corruption.
"In some instances, the files show, offshore middlemen have protected themselves and their clients by concealing suspect transactions or manipulating official records."
Offshore accounts and shell companies are among the methods used to conceal the ownership of assets. Keep reading 》》》 http://m.timesofindia.com/world/us/Panama-Papers-What-are-they-who-is-involved-and-why-are-they-important/articleshow/51682037.cms