Give a drowning man a glass of water

Used to describe someone who has no heart or compassion and won't put themselves in other's shoes.

Capt. B.J. Hunnicut:
Major Burns would give a drowning man a glass of water.

Corporal Walter Eugene O'Reilly:
Should you give a drown...

Capt. B.J. Hunnicut:
Major Burns has no heart.