I don't agree that bank loans add any value to our modern fiat-based economy. It's possible that loans may have added economic value when money was based on a limited resource such as gold, but that economy was an entirely different beast from what we have today. Fiat is not simply a switch that one can flick off and on without anticipating negative flow-on effects; and yet that's exactly how governments have treated it when they abolished the gold standard whilst continuing to support an archaic system of debt and credit. Since the fiat system was introduced, house prices have skyrocketed (relative to average salaries) and corporations have gained monopoly positions in the market whilst using lobyists to take control of our governments. Our fiat-based, debt-oriented system has some obvious drawbacks.
Both the government and the Fed are to blame; one for designing the whole scheme and the other for implementing it. I'm upset about the idea that the Fed can inject money into the economy based on obscure criteria. From the perspective of an average citizen, who is legally obliged to accept Fed money in exchange for their labor, whatever set of criteria the Fed chooses is going to be inherently inadequate; the mere lack of transparency behind the Fed's operation is by itself sufficient to discredit the validity of the entire operation.
Money backed by gold was good money precisely and fundamentally because everyone understood what gold was and where it came from. Now, essentially nobody knows what fiat money is or where it comes from and yet everyone is legally obliged to accept it.