Money man: penny rates may vary (9)

I believe the answer is:

paymaster

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'money man' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'penny rates may vary' is the wordplay.
'penny' becomes 'p' (short for pence).
'vary' indicates anagramming the letters.
'rates'+'may'='ratesmay'
'ratesmay' is an anagram of 'aymaster'.
'p'+'aymaster'='PAYMASTER'

Can you help me to learn more?

(Other definitions for paymaster that I've seen before include "Government official" , "One controlling through money" , "I hand out bread" , "Salary official" , "Official handing out money to troops or workers" .)

I've seen this clue in The Sun.

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