Question
"Central banks issue currency in countries and are the main source of employee salaries, knowing that they are usurious banks. Do people's salaries thus contain usury?"
Answer
I say, and with God's help: Salaries are in exchange for a specific work performed by the employee, and this does not affect the existence of a usury system in the central bank as long as the work you have done is permissible; because it is a wage for you, and God knows best.