why do they refuse to ask anyone to join the military?

Santorum's Yellow Elephant Speech
Santorum:
"And yet we have brave men and women who are willing to step forward because they know what's at stake. They're willing to sacrifice their lives for this great country. What I'm asking all of you tonight is not to put on a uniform. Put on a bumper sticker. Is it that much to ask? Is it that much to ask to step up and serve your country?"

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This is getting absurd! Why do the war-mongers refuse to ask their supporters to join the military when there is such a great need currently?