Jubilation about the German deal to save the euro could prove short-lived if fresh news of Greek tax evasion gains wider currency. There are more Porsche Cayennes registered in Greece than taxpayers declaring an income of 50,000 euros (£43,800) or more, according to research by Professor Herakles Polemarchakis, former head of the Greek prime minister’s economic department. While German car workers may take pride in this evidence of their export success, German taxpayers may be less keen to bail out a nation whose population appears to take such a cavalier approach to paying its fiscal dues. Never mind all that...