A spokesperson for the Department for Work and Pensions said the welfare reforms were designed to simplify the benefits system and make it easier for people to get back into work where possible.
The "Bedroom Tax" is designed to bring the social housing sector in line with the private system.
The Government believes it is unfair that some people are living in homes that are too big for them whilst other families are having to live in overcrowded properties.
It says there is currently a long waiting list for social housing.
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Calmer conditions - for now.
The 12.5 hour walkout by 63 GMB members got under way at 6am this morning and will continue until 6.30pm this evening.
37-year-old Graeme Haddon pleaded guilty to the offence which happened in his home village of Lamancha near West Linton at the weekend.