I can think of a few things:

- global competition, in that factory workers are competing against the pay/living-standards of those in poorer nations

- no unions

- a preparedness of employees to work for a pittance, towards unobtainable quotas, in unsafe conditions, for dangerously long periods of time.

I'm not sure work gets any more full-time than 12 hours a day, 7 days a week. "Full-time permanent" sounds like semantics and a loophole for companies to exploit.