The latest release on Tuesday was on central bank pay, and comes as Latvia faces the European Union's worst economic crisis. Latvia took a 7.5 billion euro bailout in 2008 and is trying to push down wages and prices to avoid a devaluation.

"Rise up and take the power back, it's time that the fat cats had a heart attack, you know that their time is coming to an end," wrote the hacker on microblogging website Twitter. The pseudonym Neo is taken from the hero of cult film "The Matrix.”

The data allegedly comes from millions of documents taken illegally from the tax office before a leak was plugged last month.

Neo's central bank data showed wages for top officials at the end of 2008 ranging from about 6,000 to 23,000 lats ($11,440-$43,870) a month. By the end of 2009, after swingeing public sector pay cuts and calls for solidarity from other bodies, the wages had dropped to between 4,000 and 7,000 lats.

The central bank has said it is competing with commercial banks for top people and needs to pay competitive salaries.

Neo has also published wages for the banking sector watchdog and the Riga municipal transport and heating companies.

New statistics on Tuesday showed average salaries in Latvia fell last year by 12.1 percent year-on-year in the fourth quarter, to 440 lats. The average salary in the financial sector was 932 lats.

"Confidence in politicians and officials is already very low and this just confirms people in their negative attitudes," said University of Latvia social scientist Nils Muzhnieks.