As has been said already, it depends on what part of the world you're in. Here in the US different parts of the country will pay differently for the same job. There are factors such as cost of living and demand for that job in that area. For instance, in the silicon valley in Calif where I work there are lots of high tech companies that need IT staff but if I lived in central Calif where there's mostly agriculture, there would be fewer IT jobs and the pay would be less.