[krab]

You usually get some extra money for the duty. And if you get woken up, the hours you spend are counted towards your normal working hours - so you aren't expected to show up in the morning after putting out a fire. Or you get some more bonus (like 2x hourly pay for the night work). That's about the balance when people are ok doing it.

But it depends on stability of your service. If it is messed up and people are woken up often, then you won't find many volunteers if they have other choice.