EB,
A lot of things go into how much hiring crew costs, and yes, a big one is how many you've lost. More casualties = more $$
This is offset somewhat by your fame, which you also asked about.
Fame goes up when you complete quests, kill bosses, find or identify artifacts, etc. Fame factors somewhat into how certain races feel about you.
Infamy tracks 'evil' actions, and is counted separately from fame. Doing quests for 'evil' races (which the Gruff do not count as), or killing harmless creatures (BUNNIES!) , or for leaving your diseased crew to die on a planet instead of allowing them back on to the ship. It also effects how certain races feel about you.
All of this is explained in the manual, which I really expect people will enjoy
The idea of "crew outfits" is actually a pretty cool one. I'd have to run it by David, but I'm sure he could knock out a bunch of little guys for customization. and some could be found or purchased, adding to the attachment.
Feel free to nudge me about this in the future. I have a lot of plans.