The documentary failed to point out a couple of important things which most people seem to be unaware of. The first and perhaps the most surprising thing is that banks don't have the money they lend. The principal of any loan is created by the bank upon the loan's provision. The banks literally create the money they lend and charge us for the convenience (or inconvenience). As the loan is repaid the principal is cancelled so, when the loan is finished, all the bank is left with is the interest we've paid on it. So, my first point is that the practice of money-lending-at-interest is fundamentally fraudulent.
Why should the super rich bank owners be allowed to create money out of nothing while the rest of us spend most of our lives in varying degrees of misery working to pay off this unnecessary burden? It is unnecessary because a state owned bank could quite easily lend people money without charging interest at all, merely a loan charge to cover the cost of running the bank. Not only that but the government could create its own loan money without having to pay any interest to itself. Think how much lower our taxes would be. Yet politicians never do this obvious thing or even talk about it. They tinker with taxes or tinker with interest rates and argue over trifles and yet the private banks have the real power because they create the actual volume of the nation's money.
The second thing that most media commentators seem to be unaware of is that the volume of the country's debt IS the volume of the country's money. According to Jeff Randall our total debt is 1.4 trillion pounds. This is also the size of our money supply because the only money in circulation is borrowed money. If the amount of debt was reduced our money supply would shrink by the same amount and there'd be a recession. As debts are paid off, loan money is cancelled and so the money supply shrinks. In this crazy financial system reducing debt is actually bad for the economy. Indeed, if all debts were repaid there would be no money in circulation at all, which is why it's impossible.
Criticising the banks for over-lending or customers for over-borrowing misses the more important questions of how our money is created and who should create it? Elected officials who can be voted out or private bankers who can't be voted out? For those wishing to look further into this subject I recommend two excellent documentaries which can be found quite easily on-line. These are Money As Debt by Paul Grignon and The Money Masters by Bill Still.