A crossbench senator says the family home should be included in the age pension asset test, as debate continues to rage over possible pension changes.

The Government's pension indexation changes are stalled in the Senate, which would peg the rate of pension increase to inflation from 2017.

Liberal Democratic Senator David Leyonhjelm said the current system was unsustainable and savings needed to be found.

Senator Leyonhjelm said the family home should be in the age pension asset eligibility test.

"Welfare should be for the poor and there are an awful lot of people who receive welfare who are not poor who could look after themselves better," he said.

"My view and my party's view is that all assets and income that people have accumulated during their life should be taken into account in determining eligibility for the pension.

"We have people living in very expensive real estate drawing a pension which is paid for by people who are working [and] paying taxes, who don't even own a house.

"That is not equitable at all."

His call follows Social Services Minister Scott Morrison previously ruling out the family home being used in the pension asset test.

Independent senator Nick Xenophon said amid talk about pension and superannuation changes, the two should be looked at together.

"I think it would be foolish to do one and not the other," Senator Xenophon said.

"I do not think it would be fair to change pension asset tests without looking at it holistically in the context of superannuation.

"There is an interrelationship between the two in a sense [and] I think that would be a pretty logical approach."

The Australian Council of Social Service proposed tightening the asset test for wealthy Australians on the part-pension, saying it could save $1.5 billion a year.

Mr Morrison is having the idea costed and said it could allow the Government to scrap its indexation plan.