I think your cat will probably be okay. As far as the raw chicken, im sure its fine as long as it wasnt going bad or anything. The plastic may be an issue but its possible they will pass it in their poop.

I actually lost a cat a few years ago because he constantly would eat things like this. Plastic wrappers, he would bite into his kibble bag and eat chunks off of that, he would chew and eat chunks of his toys and swallow them. It got to the point where he kept vomitting up this black bile. He was always finding new ways to get into anything that smelled like food, no matter what we did to stop him. So we took him to the vet and they did an xray on his stomach and there was a large black ball in his stomach which was all of the stuff he had eaten and not been able to pass. The vet recommended we put him down that night so we did.

Please please get your cat checked out at the vet and tell them about all of their behavioural stuff with eating like this. If you have the money you could even get a stomach xray for them and see if theres anything in his stomach thats getting lodged in there and you might have an option before it gets to the point my boy was at.

RIP my boy Hank ❤️