> I think based on years of service in government roles or something like that

More or less, with qualifications and levels of degree.

Eg: Was the Second Malayan Emergency active or "peacetime": https://www.abc.net.au/news/2026-07-12/rifle-company-butterw...

Active service in a recognised danger zone ups the pension rate and expands the health benefits (as does exposure to fallout - they like to medically track anyone touched by atomic testing).