On credibility issues

It's great to see the Standing Committee on Public Accounts taking up Sheila Fraser's call for more effective debt collection by the Canada Revenue Agency. But can anybody take Lib MP Shawn Murphy seriously as the point man on the issue when it was his party that, as described in the report, "has known where the weaknesses in its procedures lie and how to fix them for 12 years, yet has not been able to achieve an acceptable level of success"?