Employment Minister Tony Burke has failed to win over big business to his crackdown on labour hire, despite offering some concessions – and the two sides remain at loggerheads over how many workers will be captured by “same job, same pay” laws.

Mr Burke says only 67,000 labour hire workers, concentrated in mining and aviation, will be affected by the changes, as he confirms union officials will gain new right-of-entry powers to demand payroll records to investigate underpayments.