Australia's low debt status is being threatened; with the combination of federal and state debt heading towards levels not seen since World War Two.

That's according to analysis from the e61 Institute, an independent economic think tank.

e61 says major tax reform and spending restraints are needed, warning that debt could reach 37% of GDP in the next two years.

• Guest: Michael Brennan, CEO of the e61 Institute 
• Producer: Tyler Hall