I think you overestimate the power of these techniques. They don't add up to making people buy things they don't want. They just change the perception of the goods' value or cost. No matter how many ads I get shown, I'm not going to buy a McDonalds unless I'm hungry and want something quick and cheap that I don't have to cook. They just use adverts to position themselves as a good choice in that situation, or to improve the public impression of the meat they use (and such claims are legally required to be true so they can't just say "we use great beef" and cook you up a rat burger).