This is only applicable to the elite Admin Service. The figure you quoted is the entry level superscale for Admin Service.

Of the rest of the public sector mortals, you can hardly dream of such pay.

For the general professional scheme, it is called the MX scheme.

MX9 is entry superscale but the scale ranges something like $11k to $16k per month.

Put in bonuses and you are looking at maybe $200K per year. Nowhere near the $365K for Admin Service.