I work for a food company and my company has actually opted not to get cameras (I think part of that has also to do with $$$ I'm sure they looked into it and probably got some sticker shock. They would like to spend money on other things.) I guess the company lawyers took the position that camera's are bad for some reason and I've never heard our management talk about camera's or talk about getting them. Now granted that could all change, but for now they seem not to be to interested in cameras.
I know Sysco and US Foods have them