I don't see any contradictions. There are day jobs, and there are 24/7 jobs. Someone working 9 to 5, 5 days a week isn't supposed to answer the phone after the

I don't see any contradictions. There are day jobs, and there are 24/7 jobs. Someone working 9 to 5, 5 days a week isn't supposed to answer the phone after the work hours, that constitutes employer abuse. If the employer want to have someone always available, then they should hire people for 24/7 and pay accordingly.