So, you're saying that you have absolutely no clue whether or not they could be paid more money while still maintaining their federal benefits, but you're just going to blanket assume that they can't. Got it.
Because as a corollary, I'm very comfortable assuming that they could probably make a teensy bit more than $422 per year working 40 hours a week, full time, for $.22 per hour, and still maintain medicare benefits.
The most relevant point in what I'm saying though relates to being able to keep their benefits. The blind couple is undoubtedly receiving many federal and state benefits that pay for shelter/food/medical and life costs. If they make over a certain amount of $ per year they lose those benefits. I think the federal level to qualify for medicaid is something like needing to make under $11k per year, and that's for people without any disabilities. Undoubtedly many of these employees also participate in various other benefit programs that address their disabilities, and these programs also have certain (much lower income) requirements.
And while the $.22/hour thing is a tough number to look at, I'd be interested in knowing what disabilities that individual had in order to fall into that category. The blind gentleman in the video mentioned he was making ~$3.75/hour, which again, would not disqualify him from the benefit programs he is involved in.
There isn't some nefarious conspiracy going on with Goodwill. This is a federally recognized charity organization that is providing a service to an underserved population. While it would be great if everyone could get paid a high wage, while also receiving unlimited free medical/life care, that's just not how our system is set up.