[nostrademons]

...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.

[mooreds]

I nosed around the Finnish tax authority website and couldn't find a way to download the returns.

Even if it wee anonymized I think it'd be a fascinating dataset to play with.