far-trader
SOC-14 10K
Yes, that old Pop code issue again 
A recent/current discussion is skirting/engaging the problem again and I had a thought pop (bad pun) into my head and thought I'd throw it out here for discussion. Perhaps it or a close cousin has already been floated...
The Pop code of the UWP is not necessarily the entire population of the world or system. Just as the Starport is not the entirety of the world or system space capability.
In both cases it is the Imperial* (and therefor recognized and legitimate, for Imperial purposes) factor. That is:
A Pop 9 is an approximation of the Imperial Citizens of a system. High Pop systems will have few if any non-Imperial Citizens.
A Pop 1 on the other hand may very well mean many non-Imperial citizens. Either free people, aligned subjects, or some other non-rated population.
Likewise a Starport Class that may seem misplaced only indicates the Imperial presence and capacity, not necessarily the non-Imperial local capacity.
For example:
A seemingly incongruous UWP of a Class D Starport and Low Pop on an otherwise large garden world surrounded by more populous systems with small less than ideal worlds. Why don't those people move to the nicer world and build a better starport? Because that world is more independant. It has a large non-Imperial (Citizenship) population and local space capability. None of which is readily accessible to Travellers. So the visiting Imperial Free-Trader is limited to low cargo and passenger transport, and poor port facilities. Right next to the bustling, gleaming, high tech local port. Many Imperial Citizens on those nearby worlds would love to move here but immigration is severely limited.
* NOTE: Substitute other polities as required

A recent/current discussion is skirting/engaging the problem again and I had a thought pop (bad pun) into my head and thought I'd throw it out here for discussion. Perhaps it or a close cousin has already been floated...
The Pop code of the UWP is not necessarily the entire population of the world or system. Just as the Starport is not the entirety of the world or system space capability.
In both cases it is the Imperial* (and therefor recognized and legitimate, for Imperial purposes) factor. That is:
A Pop 9 is an approximation of the Imperial Citizens of a system. High Pop systems will have few if any non-Imperial Citizens.
A Pop 1 on the other hand may very well mean many non-Imperial citizens. Either free people, aligned subjects, or some other non-rated population.
Likewise a Starport Class that may seem misplaced only indicates the Imperial presence and capacity, not necessarily the non-Imperial local capacity.
For example:
A seemingly incongruous UWP of a Class D Starport and Low Pop on an otherwise large garden world surrounded by more populous systems with small less than ideal worlds. Why don't those people move to the nicer world and build a better starport? Because that world is more independant. It has a large non-Imperial (Citizenship) population and local space capability. None of which is readily accessible to Travellers. So the visiting Imperial Free-Trader is limited to low cargo and passenger transport, and poor port facilities. Right next to the bustling, gleaming, high tech local port. Many Imperial Citizens on those nearby worlds would love to move here but immigration is severely limited.
* NOTE: Substitute other polities as required