Nobody else was using them, so I thought it was ok... (sorry...)Spoiler:
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Well my main problem was that you obviously can't let him see the clone storage area, so how does maintenance get performed on it? Just kinda bugged me is all.
Spoiler:
Perhaps the reason they used clones is that the exposure to radiation on the moon would eventually kill any human living there for an extended time.
The symptoms exhibited by the degraded clone looked remarkably similar to the symptoms of exposure to elevated radiation levels.
So rather than deliberately put an actual human in a fatal situation, instead you simply use clones and negate the moral obligations required for dealing with 'actual' human employees.
I'm a bit unhinged from humanity so I'm unable to analyze films that way. I don't understand people.
http://gavinrothery.posterous.com/
blog run by someone heavily involved in the film
http://www.reddit.com/r/reddit.com/c...e_scifi_movie/
reddit thread where he answers a bunch of questions