I have often read posts in which people reference the utopian-sounding atmosphere of the early church (in which people sold what they had to share with others, etc.), but I think it's crucial to remember that even if we somehow were/are able to go back to this, it will still face the same kinds of problems that arise in any such similar setting.
While the early church started out as an ideal model, I think it's important to note that even the apostles ran into the same kind of human disagreements that would still challenge even the most well-meaning Christ-centered establishment.
Acts 6:1-3 -- In those days, when the disciples were increasing in number, the Grecian Jews among them began to grumble against the Hebraic Jews, because their widows were being overlooked in the daily distribution of food.
So the twelve summoned all the disciples and said, "It is unacceptable for us to neglect the Word of God in order to wait on tables.
Therefore, brothers, select from among you seven men confirmed to be full of the Spirit and wisdom. We will appoint this responsibility to them.
The same complaints would be even more pervasive today. Who should receive more, a family with a single special needs child or a family with 4 children without special needs? Who should be in charge of deciding how the resources are distributed, and whom should they answer to as a check and balance of power? What safeguards would be put into place in order to deal with abuses? How would a modern-day Ananias and Sapphira be dealt with?
If a person is selling their good individually and helping out those of their own choosing, how will they handle grumblings that the resources should have been given to X and not Y, because inevitably, this is what happens in any charitable situation.
No matter how "ideal" of a system is set up, even within the Body of Christ, you will always have these kinds of issues.
Even within the early New Testament church, things didn't go smoothly for very long.
