The theory is "we're good. Anyone we don't like is bad"
The evidence collection goes "confirms our theory, it's true." Or " Contradicts it, we either ignore it our dismiss it"
Case in point, the unaoil scandal is much more serious than anything in these Panama papers, it involves "the good guys" and it's largely forgotten a week after it release.
* ironically enough RT is (was?) pushing the theory that the CIA is behind it because there are no notable American on the list. So it's a KGB/CIA plot because Putin/Americans come out relatively unscathed