Sen. Elizabeth Warren called for student-loan companies who don't do their jobs to be fired.Andrew Harnik/Getty ImagesThe CFPB settled with student-loan company Navient, resolving claims Navient mishandled borrowers' payments.Elizabeth Warren told BI it sends a signal to the student-loan industry that they'll face consequences for bad behavior.She said that terminating servicers' contracts for failing obligations is an effective solution.For nearly a decade, Massachusetts Sen.