Gathering to guarantee monetary assistance (6,8)

I believe the answer is:

social security

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'monetary assistance' is the definition.
'social security' can be an answer for 'assistance' (social security is a kind of assistance). I am unsure of the 'monetary' bit.

'gathering to guarantee' is the wordplay.
'gathering' becomes 'social' (social gathering is a kind of gathering).
'to guarantee' becomes 'security' (security is a kind of guarantee).
'social'+'security'='SOCIAL SECURITY'

Can you help me to learn more?

(Other definitions for social security that I've seen before include "Welfare system" , "9 [INCOME] support" , "system of provision" .)

I've seen this clue in The Daily Express.

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