Again how many retirees in Australia can afford to eat lunch out every day?
At least one that I know of i.e. me.
I don't think there is complete data set of retirement income as pensions and lump sum withdrawals don't have to be reported in tax returns. Probably an unfortunate gap.
However, some data is available.
Retirement and Retirement Intentions, Australia, 2020-21 financial year
Retiree statistics and the retirement plans of people aged 45 years and over
www.abs.gov.au