The card is part of theMorrison government's "compassionate conservative" welfare redo,set to dominate the agenda when Parliament resumes on Monday,which alsoincludes a contentious plan to trial drug testing welfare recipients.
"I've always been a big supporter of the cashless welfare card,"Senator Lambie said."I've seen the results that has had."
The senator said she would see results firsthand at trial sites over the next year before throwing support behind the national rollout.
Two One Nation senators and conservative independent Cory Bernardi are set to join Senator Lambie in supporting the cashless card.
Labor and Centre Alliance have not ruled out supporting the move amid concerns over the $129 million expanded trial that would see welfare recipients in the Northern Territory and Cape York receive new debit cards.
"There's no evidence that the cashless welfare card has made any significant improvements,importantly,in jobs,"Opposition Leader Anthony Albanese said on Sunday."And that's the key issue,that we will examine any proposal that comes forward from the government."