Usury, the charging of interest, goes against the laws of nature.
To quote Aristotle -
Aristotle (384-322 BC) formulated the classical view against usury.
Aristotle understood that money is sterile; it doesn't beget more money the way cows beget more cows. He knew that "Money exists not by nature but by law": "The most hated sort (of wealth getting) and with the greatest reason, is usury, which makes a gain out of money itself and not from the natural object of it. For money was intended to be used in exhange but not to increase at interest. And this term interest (tokos), whichmeans the birth of money from money is applied to the breeding of money because the offspring resembles the parent. Wherefore of all modes of gettng wealth, this is the most unnatural." (1258b POLITICS)
And he especially disliked usurers:
"...those who ply sordid trades, pimps and all such people, and those who lend small sums at high rates. For all these take more than they ought, and from the wrong sources. What is common to them is evenidently a sordid love of gain..." (1122a, ETHICS)
Now, in my opinion the current system of banking is a scam, a fraud on a global scale.
If anybody does not believe this then I ask you to answer one simple question.
If the banks create money (credit) from nothing, yet nobody ever creates the interest needed to repay these loans in full, then how, as a society, can we ever get out of the increasing cycle of debt?
I argue it is imposible and here's why, straight from the horse’s mouth so to speak, a passage from the Fed's own web pages.
How Banks Create Money
Banks actually create money when they lend it. Here's how it works: Most of a bank's loans are made to its own customers and are deposited in their checking accounts. Because the loan becomes a new deposit, just like a paycheck does, the bank once again holds a small percentage of that new amount in reserve and again lends the remainder to someone else, repeating the money-creation process many times.
Reserve Requirements and Money Creation Reserve requirements affect the potential of the banking system to create transaction deposits. If the reserve requirement is 10%, for example, a bank that receives a $100 deposit may lend out $90 of that deposit. If the borrower then writes a check to someone who deposits the $90, the bank receiving that deposit can lend out $81. As the process continues, the banking system can expand the initial deposit of $100 into a maximum of $1,000 of money ($100+$90+$81+$72.90+...=$1,000).
Now if I go to a bank and ask for a loan (to pay my taxes) they will deposit an amount of 'money' into my account (which is infact 'credit' created via the Fractional Reserve System). To be legal tender it must fulfill at least two conditions. One, is that it is acceptable for the settlement of debts, and two, that it is acceptable for the payment of taxes. As the government will accept this credit as payment it becomes Legal Tender. As legal tender equates to real money, the bank has just magically conjured up 'money out of thin air'. Only private banks have this power.
Here is an interesting site that discusses this issue in far more detail.