When I worked down the pit we were paid from getting on the chair (shaft cage) till we surfaced again. It took on average 30 mins to arrive, change, get your lamp and stick your head in the door to see the charge hand and about forty mins when you got up the pit to put your report in (electrician, not everybody had to) hand your lamp in and get showered and changed.

But we only got paid for the underground time.

A job is a job. It's a bit like commute time. If you know the score and are happy with it, take it. Mrs Musket has 90 mins per day driving, or 7 1/2 hours per week. It's what you take into account when taking a job. The principle of paying for productive time isn't something Amazon have dreamt up.