Trying to relate this to real human nature ...
If you wanted a new building for your business, who would you call to design it? Who would you call to supply the steel to frame it? Who would they employ to mine the ore, smelt it, make the beams, etc.? Who would you call to excavate the site? All for no exchange, no money? Would people do these things out of the goodness of their hearts so you could have your building?
Who would build the power plants? Who would run the water and sewer lines? Who would pave the streets, drive the public transport, and on and on and on.
If you managed to get your building up, who would work there? Who would be the boss, and who would be the subordinates? If the boss tells you to do something you don't want to do, would you do it without question or would you tell him to take a flying leap because if he fired you it wouldn't matter as you're not being paid anyway?
I'd really like to know.