Ken Livingstone, a former mayor of London, has blamed the turmoil in Venezuela on Hugo Chávez’s unwillingness to execute “oligarchs” after he came to power. ... “One of the things that Chávez did when he came to power, he didn’t kill all the oligarchs. There was about 200 families who controlled about 80% of the wealth in Venezuela,” Livingstone told Talk Radio. “He allowed them to live, to carry on. I suspect a lot of them are using their power and control over imports and exports to make it difficult and to undermine Maduro.”