Offtopic for original question, but yeah, us Finns should be more open about salaries since our tax records are already public information. But some Finnish companies are worried about publishing salaries because they think foreigners won't even apply for certain jobs if they see that e.g. Swedish companies are giving a better salaries.
...wait, if tax records are already public information - could you create a job board that doesn't require the employer's cooperation at all? Just scrapes tax return information, correlates the "employer" field (there is one, right?) with the "income" field, and displays the average salary for every job title at every company? That'd be hugely valuable information; it's not possible to build in the U.S. since our tax records are private, but it'd give a great picture of the economy and which sectors are in demand.
