It needs to be emphasized that being an adjunct or visiting professor is NOT an "academic career track", anymore than a part-time job is a "career track". No one going into an academic career track is aiming for an adjunct position. There are people, like myself, who become an adjunct professor as a "part-time" job. I go into it because, after doing intense research work all through my career, I wanted to do something that I had always wanted, which was to teach. So unlike the person in the story, I am not desperate for money or do not have any other source of income.
And unfortunately, it is definitely a reality that schools do not pay adjunct professors enough. This has been a topic among academics for quite a while now. The nature of the support and level of income depend greatly on the schools. One definitely cannot make a living out of such a job, which is why there is often a large turnover rate for such a position.
Zz.