Caribbean politicians who lack confidence to act? (5)

I believe the answer is:

wimps

I'm a little stuck... Click here to teach me more about this clue!

'lack confidence to act?' is the definition.
I can't judge whether this definition defines the answer.

'caribbean politicians' is the wordplay.
'caribbean' becomes 'WI' (abbreviation for the West Indies).
'politicians' becomes 'MPs' (Members of Parliament).
'wi'+'mps'='WIMPS'

'who' is the link.

Can you help me to learn more?

(Other definitions for wimps that I've seen before include "Cowards (colloq.)" , "Milksops" .)

I've seen this clue in The Times.

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