If someone can't work out a 5% increase of £1 it's fair to say they're thick, same as if someone thinks 20% of the population is transgender. If you don't know how much the FTSE has increased since 2016 (cherry picked this year by any chance?) then you wouldn't class them as thick.
This is an a false equivalence and you know this.
None of these questions on the link below link are the equivalent to most of the questions you've asked, maybe only the minimum wage one. People thinking crap like the below are the reason we had brexit and 13 years of tory.
https://www.independent.co.uk/news/u...s-8697821.html