Well, now that we have departed from the serious stuff, Beags' remark reminds me of a wonderful gypsy-esque character who reckoned he had the Revenue sorted. His real liability was probably enormous, and his ploy was to drop from time to time into any tax office, as a scruffy old man, and offer them a tenner 'in case they needed it'.
They were of course obliged to accept and record these payments, which he considered not only to throw their system into complete confusion but also to reflect him as a cooperative taxpayer.
His scheme seems pretty close to that described by the late Prof. C. N. Parkinson as 'the Chinese system of tax evasion' (in his splendid book 'Parkinson's Law', where 50 years ago he was busy predicting, inter alia, that the RN was going to end up with more admirals than ships).
The 'Chinese system' depended on an appreciation of the bureaucratic cycle time, and corresponding at intervals to ensure that your file remained near the bottom of the pile. With the Revenue's current prowess in mastering the joys of IT .... could be a very long cycle time.