The guy is right - fuel is there to be burnt. But if you want to nail a slippery individual like this, you'll have to pick your moment and do LOTS of homework. Remember, he knows as much as anybody about how close you can run to the letter of the law. He'll probably be able to tell you (but he won't) how far you can cross the line. But there was no way he could be hanged for the Spanish diversions.
To nail this guy, you'll have to be creative. Spread a bit of FUD amongst the shareholders and the airfields he operates to by examining succession? Have a look at his employment and treatment of cabin crew? See if he breaks national employment laws by 'basing' foreign crews in one place, operating them from another and paying tax nowhere? Talking about operations will offer very few rewards.
PM
PS. FUD = Fear, uncertainty and doubt.