I was going to respond to this at a later time, i.e. after I went to the supermarket, but I can still say something.
Though the prices on quality food are rising, they still keep people healthy, & out of the hospital for weight-related problems. Fast food may be cheap, but the medical expenses that these foods might bring aren't. Medical intervention, regardless of what it is, has its costs as well.
If worse comes to worse, people may end up dying from eating too much of it, & that's something that nobody can put a price tag on.