New Zealand's treading water, with a warning our increasingly overloaded pension system isn't sustainable.

The latest OECD snapshot of our economy suggests unless we adjust systems, including the costs of health, long-term care and pension will increase by about five percent of GDP by 2060.

It says it could be countered by changes including upping Superannuation contributions. 

Economist Cameron Bagrie says we can't keep kicking the can down the road - and that we need to address entitlements, through lifting the retirement age or means testing. 

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