Banking royal commission: How CBA's Matt Comyn failed to stop junk insurance

For more than a year, Matt Comyn had been worried that a lucrative financial insurance program needed to be shut down by Commonwealth Bank. His boss, Ian Narev, wasn't convinced.

The head of Commonwealth Bank of Australia's retail banking division had watched for three years as hundreds of thousands of customers signed up for insurance to cover repayments on their credit cards, personal loans and mortgage contracts.