The problem with just stating income is that it doesn't take into account living costs for where you are. For instance the cost of living in Sweden is very high

The problem with just stating income is that it doesn't take into account living costs for where you are. For instance the cost of living in Sweden is very high, i.e. 500g loaf white bread is circa USD$2.69 and if you are on a budget you don't actually get to live cheaply as you can't get to the really cheap stores or take advantage of bulk buying. Plus you are not taking into account the age/maturity of the company.