Trochę a propos -- może wszyscy to znają, ale ja dowiedziałem się niedawno. Istnieje coś takiego jak islamic banking:
en.wikipedia.org/wiki/Islamic_banking
"Because Islam forbids simply lending out money at interest, Islamic rules on transactions have been created to avoid this problem. The basic technique to avoid the prohibition is the sharing of profit and loss, via terms such as profit sharing, safekeeping, joint venture, cost plus, and leasing."
en.wikipedia.org/wiki/Islamic_banking
"Because Islam forbids simply lending out money at interest, Islamic rules on transactions have been created to avoid this problem. The basic technique to avoid the prohibition is the sharing of profit and loss, via terms such as profit sharing, safekeeping, joint venture, cost plus, and leasing."