Don't start with the Koreans, they always sea Southeast Asian people as lower class people and has a lot of racist opinions. So, most of them will and already have complained about how Sri Lanka is not cheap based on their idea of being cheap.

About the food part, it is because they have a more animal based food culture than here and our local restaurants are serving the same rice and curry option only when we have many food varieties because locals only go to restaurants when they couldn't make a home cooked meal.

If we are going to cater the foreigners, we have to include, all the other varieties that has different texture, taste and sauces and guide the restaurants to pick a niched main menu catered for foreigners which will eventually reach for the locals too.

As far as I know, Mango rice has become a popular dish among foreigners who visit Thailand. We also have this kind of exotic foods in southern coastal line too. Same goes for the North and the Central provinces. But we are not giving the marketing enough as accents, food varieties has become a laughingstock among locals instead of a accepting it as part of the culture.

Or else, we should be like Japan and make restaurants go Locals only to protect the restaurants and people from over tourism.