A Bank for Co-ops
There are many ways to provide investment capital specifically to cooperatives and cooperation driven businesses. If we are to build a democratic economy, this kind of organization must become more and more important. It's not enough to talk about cooperation : we need the institutions that will bring in initial capital.
Such cooperative banking is severely limited, unfortunately, by laws which restrict banking co-ops to the same capitalist rules as the rest of the banking system.
The ideal would be a mutual bank as described by William Greene and Benjamin Tucker, which could issue interest-free credit against any form of collateral acceptable to the membership--perhaps based on the membership of a LETS system.
But the state's banking laws, like licensing and capitalisation requirements, uphold the money monopoly by creating entry barriers and enabling the issuers of credit to charge a monopoly price for it.