@EffortlessDesmond
"So if you do that @1dayatatime , my unclaimed, unused bus pass becomes taxable? The law of unintended consequences says that if this becomes too rigid, eventually the golden geese flee the coop.
Tax minimisation (avoidance) is legal, but from my days in financial services in the US in the 1980s and the City in the 90s, for every legislator or civil servant endeavouring to write a watertight section of tax code, there are three much better paid tax accountants and attorneys out to keep their clients ahead."
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Yes your unclaimed bus pass does indeed become a taxable benefit but it is your choice whether to claim it or not. Also there is still a cost of providing a bus service which you could use for free whether you choose to claim your free bus pass or not.
I also agree with your comment about tax avoidance and loopholes which is why it is important that the cost of closing avoidance/ loopholes is less than the additional tax revenue raised.