There are people, I tell you, who didn't have thew chance to be employed as soldiers. It is not like if you just want, the army will recruit you and give you salary. Joining the army is a job after all.
A soldier performs his duty because he will get salary and so that his family, his wife and children along with his buddha baap, buddhi maa can get food, clothes and shelter back in his village home.
But there are people, I tell you, who rob others, assassinate others because that is what they do to survive. They are hired criminals or contract killers.
You pay him five lakhs and ask him to kill someone, he will perform his duty. He is more courageous than any soldier in uniform.
Why?
Because he has nothing to lose apart from his life. Try to stay away from such persons.