At the end of a serious tax investigation, the Inspector of Taxes announced that the taxpayer owed over £10,000. The Inspector continued: "You know, paying tax is your civic duty and you should be proud to do what's right. I'd like to see you settle your liability with a smile."
To which the recalcitrant taxpayer replied: "Thank God. I thought you'd want money."
Thanks to Mike Thexton for what he describes as this old crusty mild joke.