port population will starve by lack of food

Stan Rogers wrote: Also if a port population was dependent on the amount of food available,would fishing become more attractive to individual ports.
Ports are already consuming supplies; once sold on the market those supplies are gone.
Yet, the trade in supplies have no effect on the population. i suggest that that will see change. each day each port need to import a number of supplies that is related to the size of the population. when the quota are not reached a percentage of the overpopulation may die (for food and rum), bank/loan guarantees may not fully be covered, lack of iron may cause lowered tax revenue from cargo and shortage of tools will slow down the shipwright.
the import vs. population ratio is to be discussed and should be a slight challenge to achieve.
All this does not increase population or productivity but decreases it until a balance is struck between imported goods and the max population and productivity
population growth happens through immigration (ship or voodoo) and sponsorship (gc/ build up port); to maintain a population at a certain level is to import the needed supplies.
the non-food supplies influence port related boons and income. max profit comes from sufficient supplies.
this change will force port owners to ship supplies to their port. this will prevent ports their unlimited growth. players get the extra choice to set their fleets to a less profitable trade route to support the port/nation or to accept a decreased population while maximising personal profit.
i believe that this proposal strengthen the game and especially the nation/port aspect of it.