NPCs have jobs too, and some of them probably really enjoy what they do.

Imagine all those people in the supervillain's sub-volcano lair, doing maintenance on the rocket gantry, operating the monorail, providing the catering. Presumably many of them think they're working for some sort of legitimate company, and have varying levels of loyalty and enthusiasm for their job.

If the PCs meet some of these sorts of low level "villains", it may not be clear if they should fight their way through them, or inform them of what's going on and save them.

Interesting...

Transcript

{Welcoming crew BT-445 arrive with a big box}
Welcoming Crew BT-445 Member: Hey, Sarge! Sorry we're late.
Welcoming Crew BT-445 Member: Leis and champagne! We squeezed some extra space-pineapple juice for any non-drinkers on board.
Clone Commander: Uh, why don't you go ahead and take it on board?
Welcoming Crew BT-445 Member: This is gonna be a blast!
Clone Commander: Good luck. We didn't find any crew.
Welcoming Crew BT-445 Member: Don't worry, we'll get them out and dancing in no time.
{they go on board}
Welcoming Crew BT-445 Member: C-c-c'mon everybody! Wooo!!!
Clone Trooper: If this party doesn't tear the ship apart, I don't know what will.