Risking life for the common good

Shouldn’t all combat roles in the State of Israel be voluntary, that is, is it even reasonable for a state to require a person to risk his life? I’m not talking about military service in civilian roles, which makes sense to require, I’m talking about the situation where anyone with a combat profile is simply thrown into combat whether they want to or not. Why not simply make combat roles voluntary and simply improve their conditions (such as higher pay, etc.)