the person doing the killing is usually paid by someone but most people are neither killing nor paying the killers. they are both paid long before someone walks into a grocery store.
they are paid because people buy the products. if nobody bought the products, there would be no money in it. are you trying to say that people would be paid to kill animals even if nobody bought animal products?
Its not buying it that causes the death, its that you've shown you want the meat, so the company is killing the animal to produce the meat for you to buy.
You want meat, they produce meat. You dont want meat, they stop producing meat.