Thats why factory jobs generally suck. I learned many trades because I knew no one could take that away from me. If things got shitty in one place, I could go to another city/country, there is always building or maintenance going on somewhere. What are you gonna do when you're 49 and lose your assembly job? Go back to school?
Actually, yes. At 49, you can go back to school. In my MBA courses, there were people in their 40s, 50s, and 60s pursuing advanced degrees. It sucks, but if they're prepared at all, they have 6 months worth of income in their savings as sort of a security blanket for times like these.
In 6 months, you can beome a freakin expert at plumbing, electronics, you name it. In a 6 month period, I earned 4 computer certifications, while working FT and going to grad school full time. I had no time to sleep and was reading 24/7, but i had to do it. In 6 months, with a library card, you can re-learn a skill which is actually saleable.
It sucks, I agree. But if there was a HUGE demand for factory workers, this same 49-year old guy would be the one playing hardball, making employers bid for his services. In 2008, it's not like that. But he could always find out what skill is in demand - whether it be tow truck driver or electrician or auto repairman - or whatever skill is required when economy sucks - and learn to do it.