What if I pay a security guard (or a soldier for the army for that matter) with an implicit non-trivial risk of being killed by an intruder he's there to repel?

What if I pay a security guard (or a soldier for the army for that matter) with an implicit non-trivial risk of being killed by an intruder he's there to repel? That seems like an even more significant "act" that will also affect their children, as well as a lot of others potentially. Not speaking of the gravity of the act itself for the person being paid. Should that also be illegal?