Of the many facets of CBA's mea culpa yesterday, its resort to a plea for improved financial literacy may be the most comic.The lack of insight and experience of customers is scarcely the issue when they turn to a CBA business with the name of Financial Wisdom.No more management changes emerged yesterday: past cleanouts are said to have done the job. And on that Narev refused to give any details whatsoever, not even the number of employees who had been shown the door.The clean up now turns to compensation, with an offer to be dangled before more than 400,000 customers at CBA's investment advice businesses, many of whom apparently have not so far bothered to make a fuss.On offer is a CBA group-backed restitution for profits not earned when they could have been earned, or, in many cases, losses that could have been minimised instead of having investments wiped out.This is an extreme version of the compo that might be warranted by the bank's maladministration.It's also one dictated by an activist parliament on behalf of consumers.This fiasco shows up the inherent irresponsibility behind moves to purge Australian hearts of the notion that the current overriding, unambiguous guarantee for advisers to act in their clients' best interests is unaffordable.