Mostly the countries which have high rate in food are not well at the economy, as I have checked many countries which have lot of varieties of food and they didn't have high price. Which is quite a good thing, but mostly when the prices are high at a country of aby food then young generation have a lot of problems to face.
Young generation mostly likes the fast food which in turn is very expensive in some countries like it includes the pizza, thr burger, etc. So this kind of food liked in countries and people love to enjoy it a lot.
This information is lacking some protein and I will like to add some to it.
When there is high cost in buying food from a particular region, it's not because there economy is bad, it could be because the standard way of living there is expensive. In Nigeria here, there are state where you can eat comfortably with $5 which you are going to enjoy so much but when you take such amount to slme places like Lagos and Abuja, you might be able to use it to buy yoghurt and a bottle of water. Even there are places that you hardly see real price been sold there because everyone are cheating each other trying to make a living through extortion, don't even try to rent houses in such kind of environment, it will be deadly.
People like fast food not because they hate naturally cooked meal, it's because they don't have the means and cooking it will take a lot of time. Some people don't have enough time to even sleep, it's now cooking meal that is going to be their priority? They will rather go for the one that is pretty fast, edible and face their work than spend half of the day slicing onions, blending pepper and bleaching oil just to make a food that you can get sharply without dropping a sweat.