ANZ senior economist Miles Workman. Photo / SuppliedPopulation ageing remains a significant long-term fiscal challenge.Despite favourable economic tailwinds in the past 20 years, New Zealand’s debt is higher than anticipated.It is vital New Zealand closes its structural fiscal deficit sooner rather than later.Fiscal pressures will accelerate in coming decades, with costs of superannuation and healthcare expected to rise significantly as the population ages.There is no one solution and successive governments will need to consider a mix of options to deliver fiscal sustainability over the coming years.