Pauline Hanson has outlined her blueprint for Australia, which would include forcing couples to have prenuptial agreements and changes to the tax system.

The One Nation leader said couples should be forced to enter into prenups outlining how they would deal with children and assets if a relationship broke down.

“Family law is high on my agenda, I just think it needs a complete overhaul,” the One Nation leader told News Corp. “It needs court-approved premarital agreements on finance and parental issues. So before someone goes into a relationship or a marriage, you must have a premarital agreement. It would be confidential [and lodged with courts].

“We’ve got to free up our court system. It’s overloaded. A lot of judgments aren’t being handed down for years.”

The One Nation leader said she would also cut the number of politicians, limit migration, introduce an Australian identity card and axe the GST and consider a flat 2% tax rate if she ran the country.

Hanson also claimed she would force foreign companies that owned Australian infrastructure, such as ports, energy and communications, to sell the assets back to the commonwealth.

The One Nation leader said an Australian identity card would end welfare fraud and claimed she would build more dams, railways and ports.

In the interview, Hanson also said she would set up a royal commission into Islam and introduce “citizen-initiated referendums”, which would give voters the ability to introduce and repeal laws.

On Saturday, the Labor deputy opposition leader, Tanya Plibersek, accused the prime minister, Malcolm Turnbull, of going soft on right-wing populists and said the party would never trade preferences with One Nation.

“We will not win support by going quiet on the things we disagree with,” she said. “We must resolutely confront the racism, sexism and religious intolerance of the right.”

Last week the deputy prime minister, Barnaby Joyce, warned the Western Australian Liberals against giving preferences to One Nation in the upcoming state election because it would spark a political fight with the Nationals.

In a warning to the WA premier, Colin Barnett, he said: “I think your coalition’s going to be a National party and a Liberal party coalition. If you want a coalition with other parties, then that’s an interesting call of events.”