ISTANBUL  French President Emmanuel Macron has called for a sovereign payment system, broadcaster BFM TV reported on Tuesday. In a video message to the French Card Payment (Carte Bancaire) summit, he said payment systems are "an essential part of our sovereignty.” "We must build a sovereign payment model," Macron said, referring to European solutions such as Wero, developed under the European Payments Initiative (EPI). Wero offers instant payments between individuals and aims to extend to