Angelous Wang said:
You seem to have a flawed idea of a what a replicator does, there are no external raw materials for a replicator.
I was going to do a long post but this is actually really easy to disprove.
All energy production requires an input of something and then is converted to something else, and energy is outputted. What is the most perfect method of this possible? Where something is inputting, and turned into PURE energy with no byproduct.
As in converted matter to pure energy. And then what does the replicator do? Turns energy into matter. So for your 1 ounce of fuel, you make 1 ounce of replicated identical material(less or more if you make something different, and in actual fact less since the conversion wont be perfect). And here we arrive back at my original point, you need somewhere to get these raw materials or fuel from.
Fuel has to come from somewhere, and you could pump matter fuel of heat and turn it into plasma, etract that THEN convert it to pure energy, but that makes no difference. Fuel is something everyone needs, and someone needs to go get it, and if everyone needs it, they will charge for it.
Likewise blueprints, entertainment, services like repairing and inventing and improving system, all of these things you cant make with a replicator. Someone has to have the knowledge to do them, and they will want something in return, or what motivation will they have to do it.
The one big problem is that replicators are not isolated all creating entities. They require things in order to work, in order to stay repaired, and you wont neccessarily have those things, other people will. And because of that currency will always exist as long as we need other people to achieve things we cannot.