What is the ruling on working in a private educational institution that relies on usurious loans for its operations and seeks profit at the students' expense, while there is no alternative employment available at the present time?

Both the borrower and the lender in a usurious transaction are sinful. A person working in an institution that deals with usury is not sinful unless they are a participant, cause, or assistant in the usury. The salaries of teachers in such an institution are lawful if their work is permissible. The institution's borrowing from usurious banks does not affect the lawfulness of their salaries, as it has other lawful revenues. Therefore, dealing with someone whose lawful wealth is mixed with unlawful wealth is permissible, as long as it is not with the unlawful wealth itself.