As Ron Paul notes, the Bible forbids altering the quality of money (which, at the time and place, was entirely in the form of coins):
Even the Bible is clear that altering the quality of money is an immoral act. We are instructed to follow the rules of "just weights and measures." "You shall do no injustice in judgment, in measurement of length, weight, or volume. You shall have just balances, just weights, a just ephah, and a just hin" (Leviticus 19:35-36). "Diverse weights are an abomination to the LORD, and a false balance is not good" (Proverbs 20:23). The general principle can be summed as "You shall not steal."
Dishonest scales are an abomination to the LORD, but a just weight is His delight.So to the extent that the giant banks have engaged in any dishonest acts or the manipulation of currencies, they are violating scripture.
Of course, any bankers who charge usurious interest rates should remember the little story about Jesus turning over the money changers' tables.
Finally, the Bible condemns oppression of the poor for the benefit of the affluent:
He that oppresses the poor to increase his riches, and he that gives to the rich, shall surely come to want. (Proverbs 22:16)To the extent that the giant banks have oppressed the poor to increase their riches, they are violating scripture.
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