The spot checks seem kind of pointless if there's no enforcement.

“That’s it! I’m not shopping at SuperStore anymore because they artificially inflate their prices! I’ll shop at Safeway… oh wait, they’re doing it too. I’ll shop at… IGA? For twice the price? Hmm… Walmart, for the same price but half the nutritional content?”

Yeah; until there’s actual penalties that could make the business unviable if they continue to violate the rules, things are unlikely to change.