economics , budget , I need help
	
	
		A govt bond has a face value payable on maturity. The face value doesn’t change, in particular because of interest rates changes. It should also be noted the RBA does a fair bit of market intervention to influence interest rate levels. 
The Australian Govt high credit rating means it negotiates very favourable debt terms for things like major infrastructure. Australia also now has the benefit of a huge superannuation pool (savings) that is looking for low risk investment return eg central government. So comparison with past circumstances is also not easy.
Personal debt levels is a concern, particularly if interest rates rise. This is a new unknown.  While it’s unknown if it will be repeated, during the depression, housing prices did not go into free fall.