I can't think of very many foods that I consider healthy that COULD even be packaged reasonably safely to put into a vending machine. If the machine is chilled and any unpurchased foods were removed and thrown away before they went bad, one could maybe stock a vending machine with hardboiled eggs, cheese, nuts, guacamole dip with celery sticks, and precooked sausage links. REAL healthy foods tho just don't have the shelf life necessary to go into vending machines.

So, slowing folks down from getting their candy bars and salty deep fried corn chips so that they'll maybe choose a fig newton cookie or a granola bar instead? Just swapping one kind of carbage for another kind of carbage... and a FALSE sense that one had made a better food choice. But how many people who choose the granola bar from the vending machine at lunch time will then allow themselves a candy bar when they stop for gas on the way home because, after all, they were good and DIDN'T have one at lunch time so DESERVE one now?