And what if no one is buying what you harvest, mine or manufacture? You can mine iron, convert it to snow-blowers that run on corn-based ethanol all you want but they would never sell in South Florida.
What if the people harvesting, mining and manufacturing don't think they are duly compensated? How will you compensate them in the first place given the limited scope of your economic model?
How much should be harvested, mined or manufactured? Are these arbitrary goals or are they based on actual economic demand? How do you gauge the level of demand? How do you adjust for increases or decreases in demand or supply?
Just a couple of starter questions. There are more after these.