I recon that chocolate / sweet manufactures just make their products smaller rather than price increase them ( although they do seem to up the prices as well ).
Wagon Wheels, Penguins, Kit Kats - they've all shrunk. Slightly off the subject I know but watched an interview with a stallholder on Bury market when they were discussing the troubles at the club and Mr BD nearly choked on his coffee. She was selling Chorley Cakes for 80p each. That's 16 bob each he spluttered. Still upsets him.