NDIS participants say their funding — and taxpayer money — is being tied up in unnecessary bureaucracy

It cost Rayna Lamb over $1,000 just to have an occupational therapist fill out forms so she could get a new wheelchair cushion through the NDIS. (ABC News: Nicolas Perpitch)

It's Rayna Lamb's electric wheelchair that allows her independence, but it's the cushion in it that makes her comfortable.

So after using her current cushion until it was almost flat, she turned to her National Disability Insurance Scheme (NDIS) funding to buy a new one.