The Health and Safety Executive (HSE) plans to recover up to £40 million from employers who are breaking health and safety laws.
The majority of jobs created since June 2010 have been in industries where the average wage is less than £7.95 an hour, according to a TUC report.
The Archbishop of York, John Sentamu, has called for all businesses to pay their staff the living wage to stem rising income inequality in the UK.
Business secretary Vince Cable has ruled out banning zero-hours contracts, but has launched a consultation on whether there should be a ban on exclusivity clauses.