The only reason I can think of to not give them raw meat is the chance of some sort of bacteria being in it. When meat is cooked to the proper temp, it kills any harmful bacteria.

I know SAS was working on getting her crew to eat a raw meat diet, but I don't know how it all turned out. I know I would never eat raw meat, and I wouldn't give it to my kitties either, because of the bacteria thing. I don't know about in NZ, but here in the states there have been many cases where people have died from e-coli which is sometimes found in raw beef, or salmonilla (sp?) which is sometimes found in raw chicken or eggs.

Neko1 is a vet tech and she might know of other/better reasons, but this would be the reason I wouldn't feed raw meat.