If I'm not mistaken, Industry and Technology brought in the necessity for money, then again, I do believe that there are still areas in this world that still stick to trade of products and/or services alone? No actual currency needed.
Ah, yes, reform of a society, now that would definitely be a trick, lol But I do believe money, or the system of currency exchange, is most useful within areas, such as cities, where there just isn't space for everyone to have a farm, and/or fields etc. And so, everyone is more reliant upon those around them, food and services alike.
Keep in mind, this is coming off the cuff now, so don't hold me to it, lol