And that money comes from where?

Citizens, based upon the social contract.

Hobbes recognized that the social contract is enforced by the sovereign, otherwise we have anarchy. That good is derived from such a contract does not mean that it is absent force... it's necessary. It is absurdity is to try and hide from that fact just because we like the initiative or results.

The specific citizens in that case are those that run banks, and contracts provided by banks are backed by governmental laws.