Two of Europe's most powerful central bankers have called on the eurozone to form its own treasury and push forward with a quantum leap in integration to secure the single currency's future. Germany's Jens Weidmann and France's newly-appointed Francois Villeroy de Galhau urged member states to move towards a "comprehensive sharing of sovereignty" which would include a common 19-member treasury and an "independent fiscal council" with a eurozone parliament. [...] Their comments are a rare sign of unity from the EU's most powerful founding member states, which have often diverged on their visions for the future of the eurozone. Germany...