What is the ruling on working in banks, and does the ruling apply to Islamic banks? And is zakat obligatory on debt and on the wife's gold according to the Hanafi school of thought?

Working in usurious banks is forbidden (haram), while working in Sharia-compliant banks is permissible (halal). The majority of scholars hold that debt does not prevent the obligation of zakat on apparent wealth (livestock, crops, and minerals), but it does prevent it on hidden wealth (trade goods, gold, silver, and banknotes) if the debt encompasses the entire wealth or reduces it below the nisab, provided there are no other non-zakat-able assets to repay the debt. The Hanafis believe that debt prevents zakat on hidden wealth and livestock, but not on crops. As for zakat on jewelry, it is not obligatory according to the majority, while the Hanafis obligate it upon the owner of the jewelry (the wife in this case). Debt does not waive zakat for the wife unless she has a debt that encompasses her wealth or reduces it below the nisab, and provided there are no other assets to repay it.