..Dom, I beg to differ Sir..
I think this site has been very good for sharing information..Most pilots know exactly, what their tax situation and responsibilities are..They indeed have hired professional help, done things right in order to avoid any trouble with the Tax Man..On the other hand, there are some, just like you said, that are trying to circumnavigate the system, and not paying there taxes right..The bottom line is, that for work performed overseas, some countries will tax you, some will not..It all depends on the local tax rules..
..Fly safe..