If the food industry could be trusted to label (and explain: typically it has left this more expensive part of the process to the government) its products properly, then regulation and watchdogs would be unnecessary.
From your posts, belle, thisisyesterday, mumblechum, I suppose you trust the food industry to put transparency before profit.
I've always found that big businesses naturally behave ethically, because, as they all know, it's often considerably more expensive to have the appropriate checks, etc., in place to ensure the quality of their products, and all businesses are devoted to spending their profits in this way. Thank god.
Thankfully, the BSE crisis, the behaviour of, e.g. MacDonalds, the use of trans-fats and corn syrups (nice and cheap ingredients), MSG, and so on in food quite prove your point that the food industry is an inherently trustworthy one with absolutely no record of ruthlessness or profiteering taking precedence over public health. Phew.
Have you tried to give blood in another country? You may find that you too (despite your obviously superior diet) are considered tainted goods because you ate meat between 1980 and 1990. Doesn't feel that nice.
Your point about natural selection is ugly. And where would you draw the line? Plenty of delightful middle class people drink too much red wine and wind up needing a little bit of state health support. But is that ok because it came from such a beautiful vineyard in the Médoc, rather than from a scientist's test-tube?