Ahhh, this comes back to the evils of capitalism.
The easiest fast buck is won by targetting the weakest.
That means children, the ‘not so bright’, and the distracted.
I have seen native fast food stores in the far East, and they produce fast, healthy and cheap meals by the road-side, much as our Mexican friend.
It is clear that state intervention is required to prevent capitalism from predating upon the weak. (Howls of protest!), but this is just what controlled ecconomies do. Yet in free ecconomies also this can happen, but it requires a different mind-set.
I have fed well in the street-side ‘Macan Store’ set on beams laid across the monsoon ditch, with rats running about underneath, and geckos falling into my beer, and never suffering any ill, indeed getting a good and filling snack, without ever getting ‘gippy-tummy’.
Super Mac though is a different question. There I come out, after a huge plateful, feeling hungrier than I went in. The meals are there designed to look big, but are also designed to be non-filling. They, and those like them, make their money by being obesety factories, predating upon the weak, not-so-bright, and the distracted.
This is capitalism.
Praise the almighty dollar, (Mammon), and the weakest be damned.