Former Labor leader Bill Shorten is pushing the Morrison government to scrap its "cruel" staffing cap on the agency overseeing the National Disability Insurance Scheme, saying the NDIS is at "breaking point" and urgently needs a bigger workforce to support it.

Staffing at the NDIA is currently set at just over 3000, after a cap was introduced by the Abbott government in 2014. Before the federal election, Labor pledged to remove the cap, arguing this would enable the NDIA to better support clients.

Labor's Bill Shorten is renewing calls to get rid of a staffing cap at the National Disability Insurance Agency. AAP

After its election loss, all Labor's policies have been up for review. But on Tuesday, a Labor caucus meeting confirmed the party would maintain its stance on NDIA staffing. Labor is hoping to use a bill on NDIS governance, currently before the Senate, to pressure the government to lift the staffing cap.

This comes amid growing concerns about the way the NDIS is being rolled out. Disability advocates have warned that the landmark NDIS could even collapse, blaming a broken pricing model and too much red tape.

Mr Shorten, Labor's NDIS spokesperson, said under Labor the NDIA would have a workforce of direct employees of almost 11,000 by now, compared to the current level which is about 3200. This cap is expected to grow to 3400 by 2021-21.

"The NDIA simply does not have the people to approve plans for people with disability and get vital equipment like wheelchairs, beds and hoists out to those who need them," Mr Shorten said.

Mr Shorten, who took the policy to the election as Labor leader, has been conducting community forums with NDIS participants and carers. This has renewed his resolve to increase the staff who support the NDIS.

The federal government is planning to fix the National Disability Insurance Scheme, offering hope to Australians living with disabilities.

He said the staffing cap was leading to "massive and costly outsourcing" and and "over-reliance on temporary contractors who can't give people with disability any continuous service".

A spokesperson for NDIS Minister Stuart Robert said there were around 11,000 people currently working with the NDIA, when contractors and NDIA staff were taken into account.

"The Morrison government stands behind them 100 per cent. Constant attacks by Labor on these hardworking people do more harm to the NDIS than deliver outcomes for people with disability, their families and carers," they said.

"The Morrison government will always ensure the NDIA has the resources it requires to deliver the NDIS in accordance with the government's commitments."

Peak body, People with Disability Australia previously welcomed Labor's election policy, saying NDIS participants were having "enormous problems" with plan delays and a lack of information about the scheme.