A typical legal rationale for protecting the consumer is based on the notion of policing market failures and inefficiencies, such as inequalities of bargaining power between a consumer and a business.
It sounds kind of expensive when you first check out, but it's actually pretty cheap if you consider it. Take something standard like a Philly roll (nori, salmon, cream cheese, cucumber, avocado). At Maki it will cost you $6, but the roll is pretty fat and you get 10 pieces. Most sushi bars charge around $5 and give you 6-8 pieces.
At Jersey Mike's, order the mini Jersey Shore favorite on wheat bread for 425 calories or the regular Chicken Philly on wheat with 620 calories. Sandwiches to stay away from include the giant-sized Chipotle Chicken on white bread that has 1,940 calories and the giant-sized Roast Beef and Provolone, with 1,470 calories.