The wife of Senator Glenn Lazarus says her husband left the Palmer United Party because they disagreed with "bullying behaviour" but party leader Clive Palmer has denied bullying anyone.

Tess Lazarus has broken her silence and issued a statement defending her performance 24 hours after being sacked by the party for "failing to comply" with the terms of her employment.

Mrs Lazarus was hired by the Palmer United Party to run its Canberra operations but was based out of her husband's Senate office and was widely regarded as his chief of staff.