With an increase in wages, this man's going to cause chaos (5,4)
I believe the answer is:
raise hell
'going to cause chaos' is the definition.
I can't tell whether this defines the answer.
'with an increase in wages this man's' is the wordplay.
'with' means one lot of letters go next to another.
'an' becomes 'a'.
'increase' becomes 'rise' (rising is a kind of increasing).
'in' indicates putting letters inside.
'wages this man's' becomes 'hell' (I can't explain this - if you can you should believe this answer much more).
'a' going into 'rise' is 'raise'.
'raise' next to 'hell' is 'RAISE HELL'.
Can you help me to learn more?
(Other definitions for raise hell that I've seen before include "create commotion" , "cause trouble" , "Complain in the strongest possible terms" , "Make trouble" , "create discord" .)