Consider that you're working in a big company. Logistic has some problems with part delivery and fixed it, there was some problems with equipments and maintenance members are called in the night and fixed the problem. There was some problem with configuration of robots and and the related team fixed it as soon as possible. But at one point, there was a problem in production system. But IT member is not opening his phone since he has got a special day and all people in the factory is waiting. If your applications are supporting some critical systems then you don't have so much choice. You can discuss about working in cycle, paying more etc. but most of the time this is not true in reality. Even in some big companies, IT members have big responsibilities. But I also see that some part of the IT isolate themselves from the critical processes and don't take big responsibilities and risks. This one is also another choice. But generally people hate these IT members. I hear people saying "they take the most money and no responsibility while we carry the burden of company". But who cares about the opinion of "users"? Just check item #4