EX-president of Venezuelan state oil company accuses government of eroding morale ***Other bones of contention were the central government's demand that the company hand over $4.4 billion in dividends last year, forcing PDVSA to borrow $500 million to pay the bill; and the oil sales to Cuba, whose leader, Fidel Castro, is Chavez's longtime mentor. · Chavez has insisted that oil sales continue to Cuba, despite an unpaid $97 million bill for past sales. ***