It's the basic principle behind the
Homestead Acts which the US government used to populate the West and Midwest regions by offering basically free land to anyone who was willing to go out there and turn it into a farm. Then massive agricultural mismanagement resulting in the
Dust Bowl due to the mistaken belief that '
Rain Follows the Plow' led to a massive drop-off in migration and eventually the Homestead Acts were repealed after pressure from environmentalists wanting to preserve what nature remained in federal land and the fact that basically no one was using it for its intended purpose anymore. But in Ulthuan where people presumably aren't stupid enough to cause an enormous environmental disaster it makes sense to offer up unused government land to those that will actually make use of it or have a version of squatter's rights that forces those that own massive amounts of unused land to make use of it or be forced to give it up to those who will.