How can we test if the money system works?

Previously I discussed about the possibility of the private issuing money system and I think three rules should be set: a complete separation between ownership and management, private firms only issue money to pay their workers’ wages and the government taxation on firms’ revenue. After setting the three rules, I think the next step is how we test if the model works. The first phase is to build up a model by computer programs. Computer programs can give us some ideas how the system will work in our real world. The second phase is to start from a small community, if it passes the computer test. Containing it in a small community can also contain the possible damage within a small scale. The money generated by the new system could be seen as a kind of foreign currency, with a floating exchange rate. The floating exchange rate can use the market force to value the new currency. In addition, it helps to prepare the next phase. The final phase is to transfer the old money system to the new. The exchange rate can help this stage and replace the old money with the new money.