Good luck with that one. It was reported recently that HMRC have been investigating the potential impact of removing the ability to salary sacrifice pension contributions.Another thing that some other countries do better is the ability to write off the train fare to tax. For example, Liege to Brussels is about 100 km and the regular season ticket is EUR 3,064 per year (which is already quite cheap). But if the employer pays for it, it only costs EUR 2,451.
Can't see the Treasury gearing up to make season tickets salary sacrificeable.
About 10 years ago the government cracked down on lots of salary sacrifice arrangements. Used to be able to salary sacrifice gym memberships and all sorts.