While it of course benefits the truly disabled, it's also the only place to turn for older unemployed people with no realistic job prospects.
It isn't a generous program, and barriers for applicants are quite high. I don't mean to suggest fraud is a big problem, just more that there are people who if they could find the right job situation could in theory work, but it's hard enough finding a job at 57 if you're in perfect health, let alone if maybe you're in less than perfect condition.
