One of the reasons I left academia is that my travel costs to work cost more than I earned. One of the reasons I left academia is that I was expected to mark essays and exam papers for free - work on which the students' future impinged. This was work that these students were getting heavily indebted for.

The current system is grossly unfair and needs to change or it'll get to the point where only students who can afford to will be taught by only lecturers who can afford to teach.