Sham contracting is when an employer tries to disguise an employment relationship as an independent contracting arrangement.
Often they're trying to avoid paying entitlements like minimum wages, penalty rates, overtime and leave.
Sham contracting is unlawful.
https://updates.fairwork.gov.au/link/id/zzzz61515be094dbf411Pzzzz6049e4f009642863/page.html