Quote origin?

[Just Bob]

There's a line In Sassinak (I think, might have been Generation Warriors) where the Chief of Security on Sassinak's ship says something like:
"Soldiers are payed to do the jobs human beings won't."

It's a really great quote. I'm reminded of it many times while watching films/TV with soldiers in, and it keeps getting more apt. It's not really very... Anne, though. She never followed up on it very much, and it's not the kind of territory she tends to cover in detail. I can't think of many occasions in all her books where front-line soldiering is going on.
It occured to me that the line might be borrowed from somewhere. After all, lots of people do it. I even do it from time to time. If so, though, does anybody know where?

[Kath]

No, it's not very Anne at all.


But it IS very Elizabeth Moon.

[Brenda]

Yeah, that's definitely Elizabeth Moon.

If it was Anne's, I'd guess Kipling, but I don't know who EM would quote.

[Greenrider Tresa]

Well, putting the phrase into Google didn't do any good. Could EM have made it up? An observation, or maybe a self-quote...

[Brenda]

Or maybe it was intended that the character quote it, but not from a source we would know.

[Greenrider Tresa]

That could be it. :)
I'm also reminded of Jack McDevitt's and Tara K. Harper's tendency to have their characters quote sayings and such that they invented just for their series.

EM could just be doing the same. Not sure if I'm explaining what I mean clearly enough.