Well, a bunch of people wrote a bunch of parts of a manuscript based on stories passed down for a couple of thousand years, which was then gathered together by a bunch of other people over the course of several hundred years to produce a book. Apparently that is all the evidence they need to prove everything.
Also, anything not in said book can not exist as that book is the sole source of truth in the universe!
(compared to 50-60 hours a week regularly on the IT side)
You neglected to account for tax. You also ignore transportation costs as you assertion that "A person in that situation would not have a car or transit pass" would also mean that a person in that situation would have no job in many areas, especially rural ones.
Additionally, in some areas, such as where I live in the Metro Detroit area, not having a car pretty much guarantees not having a job, even though there is a guy here that walks 21 miles to work, each way, every day, not many are able to do that year after year.