Thousands of public servants took strike action on Monday to demand better pay.

From Whangārei to Invercargill, Inland Revenue Department (IRD) and the Ministry of Business, Innovation and Enterprise union members walked off the job to attend rallies.

According to Public Service Association National Secretary Glenn Barclay, there’s a lack of transparency.

“This issue is about pay. It's about the terrible pay systems that these two agencies have got - they lack transparency. But it's also modest across the board increase for our members.”

For IRD, it’s the first strike action their workers have taken in 22 years.

But the executive director of the Taxpayer's Union, Jordan Williams, says the strike should be ignored.

“At the IRD and MBIE there's no shortage of people who want to work there, they're actually already well paid and we should ignore the strike.”

But Barclay disagrees.

“No, our members are not well paid; these members, in particular, are mainly frontline workers. When the government announced its living wage increase on the first of September, we identified that well over 200 people in each of these agencies were under the living wage.”

Monday's strike follows similar industrial action taken by nurses and next month primary teachers are planning on going on strike.