For example, the highest income tax rate in the UK is 45%. If I estimate that it should be 60% can I truthfully say that right people are getting a 15% (of pretax income) income subsidy? There is 0% VAT on books, if I think it should be the standard 20% can I truthfully say the government is subsidising the purchases of books? When people were campaigning to abolish the 5% VAT on tampons and STs would it have been a valid counter argument to say they were being subsidised by not being subject to the 20% rate?