Hundreds of job centre security guards are walking out today as a pay dispute escalates. Officers in Margate will join those employed by private outsourcing giant G4S across the south east and east of England for the week-long strike. Eamon O’Hearn, national officer at the GMB union representing them, said: “It’s not rocket science – if the Department for Work and Pensions (DWP) and G4S want to end this dispute, make sure these guards are paid enough to live on. “G4S has been handed millions by the government, yet our members can barely afford to feed their families. “The work they do is hard;…