Going to starfliers would be pointless. It would still ruin alot of RP. For example why would say "admiral Hale" be in a starflier, and not atleast a military fighter?
Also it would be hours upon endless hours to start up 20-30-40 chars in starflees. So again time i do not have to waste recovering my chars. So i would say screw it and leave.
Took me 6+ years to get what i have, and that was when i had alot more time due to being younger, and not working. Older now, and working, so all wiping out ships would do is give all the younger kids, and lolwuts with more time then brains a chance to get ahead of vets, and basically run amoke all over the server.
A cash wipe is fine, it gets rid of billions, but atleast players keep thier chars/ships. As for people storing cap8s like you say? Why would staff need to tell people ahead of time this was coming if they decided to do it.
Either way this would not help with server population, it would actually hinder it. Many would leave if they lost cash, and a huge amount would leave if they all started from flees.
1 example of this. World of Tanks. I was in closed, and open Beta. We had 50K average players in Beta, then everything wiped when it opened, and now we average 30-40k at busiest hour.