It isn't possible without a a governing body to regulate population growth.
The current system we have, do you believe people in the 1st world country willing to share resources with the people in the 3rd world country? Or more likely take what little remaining of what they have?
Well the people born into the system wouldnt be sharing since they never had "ownership" of the resources.
Currently... no i dont believe people would be willing to share unless they truly believed the new system could provide them "more" then they currently have.