Soldato
Because taxes generated from trade are not confined to the company tax of the trading company and the income tax of the employees like you said. Bringing money into a country through trade will generate more than that.
People dont just put their money into bank accounts though - they buy things. Most of that spending will be done locally in the country where the live generating further taxes.
It's wrong for you to ignore any knock-on benefits from trade.
With all due respect you are ignoring the meat of the argument. As I already said we can argue about the amount of taxes raised (and the knock on benefits) but we must also agree that the relationship with the rUK brings 4 x as much benefit BEFORE we include the Barnett Subsidy which is DIRECTLY used to finances public services in Scotland.
It would be simpler to put a figure on the amount you think the EU trade relationship brings...then multiply it by 4 /4.5 for the UK then ad Barnett.