So the individual items they spent credits on at character creation should really be viewed as the group's items then?
Totally up to the players. If I'm a doctor, currently unconscious, and the pilot is bleeding out you are most welcome to use my medpac. Unless I'm stingy about that, maybe it is part of my obligation because my mother was a doctor and gave it to me right before her landspeeder crashed.
My datapad on the other hand I wouldn't share...for personal reasons. Nobody needs to see my digital collection of the wookie swimwear catalog.
For me, if it doesn't defy common sense (or the social construct of the group ingame) and the players are happy with it, it's allowed.
(personal tip/opinion, always declare at the start of the campaign that everyone is (at least) friendly to each other, makes gaming way easier, unless you want the tension and you and the group can handle it)