The idea is that sets them up because going back to working as a butcher or something would be a bit weird after being a national public figure. The reality is they do speaking engagements and join boards as well, raking it in.
https://www.crikey.com.au/2019/09/02/australian-mps-pay-afte...
Apparently it was changed so it's not quite as generous now, maybe someone can decode and summarise the current rules.
In addition, former prime ministers can still remain members of Parliament if they get re-elected for that role, as is the case with Theresa May.
The overwhelming majority of Australian politicians are career bureaucrats of one form or another.
It'll take me five years of 60 hour weeks in a noise dirty dangerous environment to earn what the PM makes in a year.
Also our pollies get a very generous superannuation contribution of 12% of their salary.
They're set for life as long as they understand money.
Paid speaking engagements appear to be fairly lucrative for former politicians.
Singapore has a very similar mindset on political salaries, and they are much higher even than the Australian PM. But as an outsider with one foot in due to family, it seems that they are culturally very anti-corruption after living near their neighbours which makes it work better.