The contents of the bag is ba<x>sed on weight and not volume. The leave room in the bag to help prevent crushing and settling of the contents.
To leave airspace so fewer get broken.
Because it is really difficult to put them in from the top downwards !!!!!
They make everything smaller now, and more expensive so they can reel in a few bucks more each time you're feeling peckish. **** them.
The extra air in the bag prevents crushing, and the chips do settle during shipping
there can never be enough chips...thats just life lol