Things might be that way in your specific center, but it certainly isn't that way at ours. I've only worked at my center for a few months, but I've already met several "old timers" who have been here for years...one for 12 and going strong. And no, these aren't managers I'm talking about either. They're floor workers just like me.
There are definitely things I'd change about my center, but none of the things you've mentioned in your post happen. We are most definitely not allowed to work off the clock...much less encouraged to do so. I've had a few necessary times for a restroom break and was allowed to simply log off for the two minutes it took to handle business.
And while I agree with the high turnover rate, not all of that is DTV's fault. A lot of it is the employees they hire. The work ethic in our center is downright pathetic. A lot of the CSRs are very young and think that working 6 hours is absolute torture or that it's unfair that we are only allowed 4 tardies in a three month period. Being a victim of recession and finding myself at DTV working an hourly wage for the first time in years, I just have to laugh at all of their complaints and expectations and wonder how in the world some of these young souls are going to handle a 40+ work week one day.
I'm not saying you're one of these young'uns or that your situation isn't real, but I just want it known that this isn't the norm or regular procedure. If it was, I'd be experiencing it too. On a wild guess (and after working in retail for many years), I'd say your local manager was trying to make cuts for one reason or another. Either way, it's not some mandate handed down by DTV to all centers.