What kind of restaurants are you thinking of?

I've never eaten in a restaurant and thought they're bulking on potatoes.

I find restaurants steer very clear of potatoes because they don't have any wow factor, and with the volume of food that goes to waste in most restaurants to produce a perfect little plate are they really worried about how much the raw materials are costing them?

Plenty of places in the US will happily drop 500+ calories of french fries on a plate of food. Granted that is mostly limited to "American" food.

There are other equivalents; Cantonese places will try to load up on bean sprouts to boost the weight of the dish.

> to boost the weight of the dish

This claim doesn't make any sense. Who buys restaurant dishes by weight?

I misspoke and meant to say volume.

That being said, you can buy some Cantonese food by weight: https://en.wikipedia.org/wiki/Siu_yuk

Although weight may still have some validity in terms of making you feel full and satisfied.

There's a buffet near where I work that sells by weight.

Steakhouses. Any place that primarily serves Sandwiches/Burgers and fries.

Pretty sure those places also feature potatoes heavily because people like to eat them with those entrees.

I know I love mashed potatoes with my steak. And fries with my burger.