I think it was the brave captain Zapp Brannigan who said it first, but might be mistaken here.

Zapp's quote was "Soon you'll all be fighting for your planet. Many of you will be dying for your planet. A few of you will be forced through a fine mesh screen for your planet. They'll be the luckiest of all."

Unless you're thinking of something else, but I can't find anything that comes close to the sentiment other than the above.

You're probably right. I was quoted this as something Zapp said by someone recently, and I didn't go verify if it really was so.