[metmom]

Ethics are for people who don’t have morals.

[who_would_fardels_bear]

"Ethics are for people who don’t have morals."

Pithy comment, though not particulary useful.

'Ethics' and 'morals' are generally interchangeable terms in philosophical discussions. So your statement would read either:

Morals are for people who don't have morals.

or

Ethics are for people who don't have ethics.