We need to incorporate portion veracity into food sanitation checks. Food safety guy goes in, buys all three sizes of fries, weighs them all, compares to the nutritional fact values posted by the company.
A nice way of saying Fuck Off, basically. No consumer protections for this kind of thing exist, at least in the USA. Other than Weights and Measures enforcing scale calibrations if you buy things by weight.
They’re already required to provide nutrition info. They’re free to have undersized fry cups as a marketing gimmick, but need to accurately represent how much they give you.