Could it be that some of the reference's of Humans not using money be just propaganda that has been taught to every human from birth?
Jason
Can you provide a modern day 21st century (or earlier) example of this? How can propaganda convince Cmdr Joe Public that humans don't use money then have Joe Public turn around and use money? Riker used money at Quarks. Picard used money when negotiating with Ro in the DMZ. They know what money is and how to use it. Therefore, they would know if they use money within the Federation. How could they then believe propaganda that humans don't use money?