In order to reduce the dominance of big server farms and allow the small farmers with only an average computer to still have a chance to earn an income from safecoin, why not distribute network resources/safecoin by giving more priority to areas which are least populated with farmers.
For example, A person in a poor country in AFRICA running a node gets more safecoin than someone with the same quality farmer in New York City. This would help distribute farmers and maybe even people! around the world.
EDIT: The network would dynamically adjust its reward structure based on the changes in node density within geographical regions.