If the NDIS is an insurance scheme then at about $30 billion per year now and covering a population of about 26 million the premium would be $1,111 per person per year.
In 2030 the NDIS is forecast to cost $64 billion per year and the Australian population is projected to be 30 million, so the premium would be $2,133 per person per year.
If we compare this to Health, the cost of Health in Australia is $200 billion which is $7,400 per person per year.
Education is roughly $3,700 per person per year.