I think this perspective is more of a dialectical analysis. If you propagandize about a job and make it not seem as immoral as it is, and keep poor people from having other options, then inevitably a lot of brainwashed poor people are going to sign up. That's just how it's gonna be. ISIS arose because of local instability that we caused, that doesn't justify their actions, but it does explain how it happened. If you want to lower military recruitment, giving people better alternatives helps immensely. Areas with high minimum wage in this country is exactly where recruiters have a hard time.