The General Workers’ Union has called for an urgent investigation by the Auditor General into the role played by the government in the award of public cleaning tenders to companies belonging to Dominic Gafà.
In a statement, it noted that in 2012 the government awarded 27 cleaning contracts to Mr Gafà's company.
The contractor is at the heart of audio recordings released by the PN last week featuring comments by GWU General Secretary Tony Zarb.
The union said the values of the contracts were so low, that the government must have been aware that workers were employed in precarious conditions.
The GWU appealed to the prime minister to shoulder political responsibility for the exploitation of these workers and called on him to supply the necessary documents to the Auditor-General.