I'm sorry, but no, they wouldn't.
Just taking the system the player group (formed of Star Citizen backers) I'm a member of has as a base in a "nothing special" independent system on the outskirts of the bubble. That has a population of over 17 million. Then you have the extremes like Sol which has a population of almost 23 billion. If you think a small bunch of players can dramatically effect populations of that size then you're living in lala land.
Well, it depends on several factors.
- How many npc and player ships are destroed daily.
- How many ship production plants exists, Not shipyards where we buy them, but produce them.
Lets say there are 3 factories making ICouriers in empire and churn out 300 in total per day.
the amount of population is in a way irrelevant but rather more about production centers.