I have to agree with your friends! Healthy food comes at a ridiculas price, even farmers are paid by the governments to not produce too much of it to keep the demand and prices high.
A small box of fruit such as grapes or strawberries is more expensive than a multipack of crisps.
It costs me a small fortune to feed my family a salad meal for dinner, yet I could make them sausage, chips and beans for a fraction of the price and have remaining sausages left over to go with a meal another day.
Food prices are about to get a 4% hike as well :(