Uber drivers have been complaining that the gap between the fare a rider pays and what the driver receives is getting wider. After months of unsatisfying answers, Uber Technologies Inc. is providing an explanation: It’s charging some passengers more because it needs the extra cash. The company detailed for the first time in an interview with Bloomberg a new pricing system that’s been in testing for months in certain cities. On Friday, Uber acknowledged to drivers the discrepancy between their compensation and what riders pay. The new fare system is called “route-based ...