Plenty of wizards are fairly high IQ, and a 6k salary these days is pretty average outside rural areas. I don't see anything out of the ordinary in it.
Most wizards can get gainful employment if they want to, what kind of employment it is, depends on their IQ and qualitications.
It's not impossible to become a software engineer if you are at least 110+ IQ. The certificates are cheap and the programming languages can be self-taught given 3-5 years of dedication.
I freelance as a programmer and I have zero education towards C, Python, SQL databases etc., everything I learned was from Stackoverflow, Reddit or phpBB forums as a teenager. I can easily get $1k for a gig that takes me a day or two to finish.
But I don't get those gigs all the time so it's uncertain employment.