NDIS Minister Bill Shorten said payments for sex work will be banned under changes to the scheme, conceding a wide range of services being billed to taxpayers are unsustainable.

Mr Shorten slammed the opposition and the Greens for dragging out passage of legislation to overhaul exploding costs, saying another round of parliamentary hearings will slug the budget by $1.1 billion – the equivalent of paid packages for as many as 60,000 children.