I tried to apply for SSDI.  They told me even though my autism made it nearly impossible to get a job, the fact that I did have a job for 12 years meant that I was capable of working, therefore ineligible for support.  They did put me on a job find/support/training program, but absolutely nothing happened (no interviews, no contacts, no recommendations or suggestions) for six months and I quit.
I once met a blind lady who was a receptionist.  If she lost her job, would she be refused support because she had been working.  I also know a couple paraplegics?  If they lost their jobs, would they be refused support because they had been working?  I suspect in both situations, they would go back on SSDI without a problem.