Egg prices are soaring again. Here’s why and what to expect

The chain to get eggs in your local store is shorter and they are easier to produce/collect.

Coffee is imported, hamburger needs to be processed, so more labour is required.

Those would be my guesses.

Eggs are a food staple: they are consumed often and in larger quantities. They are eaten directly, but also included as ingredients in a lot of food. So this means that the price of eggs directly impacts your budget/ability to buy them directly, as well as for goods made with them. Same with milk, potatoes, wheat, etc. Their prices tend to be a sort of broad economic barometer.

And we actually do use hamburgers as a metric. There’s the Big Mac Index for example. It’s used to measure purchasing power between different countries.

https://en.m.wikipedia.org/wiki/Big_Mac_Index