I don't expect Jimmy Carr saw the funny side when Prime Minister David Cameron denounced as immoral his use of a tax avoidance scheme that reportedly cut his tax bill to just 1%. He wasn't breaking the law and his use of the "K2" scheme had been fully disclosed to HMRC. But the tide of moral indignation swamped the cheeky chappy and forced him to admit a "terrible error of judgement." The scheme had been recommended by his financial advisor and that got me thinking about our role in advising clients on the best ways to manage their tax affairs. [...]