Newstart, family tax benefits and the disability support pension - all targeted in the budget - are growing far more slowly than other government spending, a new analysis finds.

Prepared by the Australian Council of Social Service from estimates used by the Commission of Audit, the analysis finds total government spending on track to grow 3.7 per cent per year above the rate of inflation for the next decade.

But spending on the disability support pension is projected to grow only 2.8 per cent, spending on unemployment benefits only 1.1 per cent, and spending on family tax benefits is expected to slide in real terms even before any budget cutbacks.

Even the age pension is only expected to increase in cost 4.7 per cent per year above the rate of inflation.

The really big drivers of government spending are childcare and paid parental leave, whose costs are set to soar 14 per cent per year above the rate of inflation; hospitals whose costs are set to soar 11.7 per cent, and carers payments whose costs are set to soar 10.2 per cent per year.