You could make a similar argument for every employee that works in the food industry, including the entire supply chain. Personally I find an $8 combo at Macdonald's expensive enough, we'd be looking at $12+ if everyone had a "proper" level of training.
Macdonalds is interesting because they already have a strong internal training program, and food handling is one of the issues they take care of (to a standard higher than most regimes they operate in).
In my experience, everyone at MacD's actually does already have a proper level of training. Cleanliness and food hygiene is certainly a key part of the training program.
going further, where I am, pretty much everyone in the food supply chain does actually have that training, and the food supply chain is very trustworthy because of it. Perhaps you just didn't notice because it all works so well.
