Going back to the original question - I bought some cheap meat from a Tesco a couple of years ago. I'm normally a Tesco boycotter, but we were in a holiday cottage and it was Tesco or a really tiny village shop, or a 20 mile drive.
I bought a pack of pork chops, a pack of beefburgers, and some chicken legs, as part of a 3 for £10 deal.
I have never seen so much fluid ooze out of those pork chops as they pan fried! Of course meat shrinks in cooking, but I'd never seen it to this extent before. When done, they were chewy and tasteless.
The same happened with the chicken, and the beefburgers were cardboard-like too.
A few weeks later I saw a programme about how water is added to meat to make it look plumper and weigh more, and all became clear!
Some people around here moan about Waitrose, and were overjoyed when Tesco opened. But I'd rather pay £5 for pork chops that taste nice than £3.33 for pork chops that don't.