Well, we do agree on the fact that an economy cant exist when there are no serious limitations, if I understand you correctly. I think the point where we are disagreeing is whether or not that would be a bad thing. Its hard to summarise (especially if not in your native language) so tell me if Im wrong, but I think what it comes down to is this;
I think an economy would be an incentive for roleplay, while you think it would hold rp down (very summarised here).
We have very different views of the whole experience the server should provide I guess. You think that RP will flourish because we are a Roleplaying server, and people come here to roleplay. How one gathered the items that are used for this roleplaying are therefor unimportant, as long as there is a good story going on, and you state early Aegis (I wasnt there yet unfortunately) and the current situation as examples. Am I correctly summarising here?
I think that it would benefit roleplay greatly if what one roleplays does actually make "real" sense in game. So, if I am out in the woods and I run out of food, I will swear at myself and walk all the way back to find a farmer willing to sell stuff. I think when things aren't limited, no-one would do that, as you could just build a small farm right there. Ofcourse, you can still walk all the way back to find that farmer if you so please, but most of us wouldn't (I dont). Therefor, the farmer is useless. Restricting what one can do would mean the farmer would actually feel useful when growing crops, for there will be those who NEED to buy it for they cant craft it themselves.
In the current situation, roleplaying fi a farmer isnt doable, for no-one needs your produce so no one will come to rp with you. This in turn leads to a lot of would-be farmers running around in the world looking for their own big adventure. That at least is what I see happening in the current world, some more experienced players are running their kingdoms/clans/order/etc. while the less experienced or less involved players are part of those organisations and havent got much more to do. I went and offered to mine for the elves, but they will never accept as they can simply do it themselves, so only the racial rp is left. There is nothing I can add to the world by simply playing my mining character, the only thing in which I can stand out is with having the most epic adventures or aspire to become a commander of this or that. If professions were in place, someone would need my skills in mining, and I would need someone to for my food and tool supply. I think thats an example of adding to rp.
I understand your view when you say that these rather unimportant items should not take up time that could be spend roleplaying something greater, but this I think is mainly true if we are all going to play heroes and villains. Without restrictions, the "simple folks", lumberjacks, miners, farmers etc, would have no rp at all unless someone is kind enough to pretend they cant provide the items themselves. No restrictions will lead to everyone gathering the resources they need where and when they need them, before setting out on their own "big adventure", without any regard of how they really got the items. Having someone who is capable of gathering the resource a little faster does not chance anything to this. If I run out of pickaxes, I will go outside, cut down a few trees, build me some new pickaxes and go in to mine again. If Im out of food, I will make a farm, grow some wheat, replant the farm, make myself some bread and go back into the mine. Im not going to look for someone who would maybe make a better yield out of my farm, and Im not going to RP I cant do these things even though I would rather have my character find a lumberjack and a farmer to do it for me. Also, the lumberjacks and farmers of the server are usually not there, because they are fi out mining to get some stone for a new axe or hoe, or more frequently are out on a big heroic adventure because they got bored doing a job no-one needs (shops would help, but thats another topic).
You say that acquiring items that arent a major plot point for you character should not be a big concern, but with that, arent you actually saying that you have a planned future for your character, instead of letting the surroundings determine the future of your character? I do not know what "plot" my character will be in, so I do not know in advance what is or isnt a major plot point. As an example, I was planning on mining a set amount of stone for the dwarves, ran out of food and in my search for food I ran into someone who offered me a steady supply of food and a roof above my head if I would work for him. This happened only because I refused to just grow my own food on the spot, and because of this, the simple fact that I was in search of something to eat might be a very big plot point in my characters life, as I now have a job in an order I would otherwise never have noticed. I think thats much more RP then my mining dwarf tending a farm and cutting trees and slaying mobs when he needs something.