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Super friends club
Bingo at the New Lynn Friendship Club. For most members NZ Super is their only source of income.
( RNZ/Anusha Bradley )

People are living longer and healthier lives, but New Zealand Superannuation is soon set to become the government's biggest single expense, with costs expected to triple to $30 billion by 2030.

The Prime Minister, John Key, has ruled out raising the age of eligibility or changing the way Super is handed out, while at the same time pledging to reduce, not increase, the government's debt.

Anusha Bradely explores how the costs of an aging population will be paid for and what the impact on future generations might be.