earn (one's) corn

earn (one's) corn

To be worthy of the money that one is being paid. I think you should hire the most experienced candidate because she'll definitely earn her corn.
See also: corn, earn
Farlex Dictionary of Idioms.

earn your corn

BRITISH
If someone earns their corn, they are successful and therefore justify the money that has been spent, for example on employing or training them. New striker, Steve Menzies, earned his corn with a last-minute goal. Managers earn their corn in these difficult circumstances.
See also: corn, earn
Collins COBUILD Idioms Dictionary, 3rd ed.

earn your corn

put in a lot of effort for your wages. British informal
See also: corn, earn
Farlex Partner Idioms Dictionary
See also:
  • earn your corn
  • have eyes like a hawk
  • come from
  • come from (someone or something)
  • break down and cry
  • have something at your feet
  • have the world at (one's) feet
  • have the world at your feet
  • go down the wrong way