Also, morality is always attached to anything which involves society and its institutions. For example, good faith in contracts (bona fides) which has evolved all the way from the roman republic is an example of codified morality which proved to be quite useful in societal transactions (i.e. it solidifies expectations of behavior and hastens transactions). Explicit moral value perhaps may not be visible ("basic economic tool") but it is certainly built into foundations of every and any contract.