In many works of fiction, the hero will have to stand up to a large number of villains who aren't really especially bad people; they're simply doing their jobs. The same, naturally, applies to heroes. The Punch Clock Hero isn't fighting for peace, revenge, or because it's the right thing to do. He's only going against the Big Bad because he has to. In some cases, he is destined to do so but refused the call, only to find out that You Can't Fight Fate. In other cases, he gets involved only because he has bills to pay. Only in It For the Money is a subtrope, as is Not in This For Your Revolution.