Almost half of New Zealand's public servants are working from home one day a week, according to data released by The Public Service Commission. 

The IRD and the Ministry for Ethnic Communities have more than 80% of their staff working from home at least once a week. 

Public Service Association Acting National Secretary Fleur Fitzsimons said it might not be a bad thing. 

"We want a system whereby public servants are able to work from home, where it offers a win-win for them and for the employer."

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