You might find the essay, 'The Checkpoint' interesting (and thoroughly bleak). It is by an Israel Defense Force conscriptee who started working those internal checkpoints between israel proper and the occupied territories.

It is an account of how an even more extreme situation is utterly soul-destroying for the people working those jobs, no matter how good their initial intentions are.

http://www.bostonreview.net/BR37.4/oded_naaman_israeli_defen...