The phrase "wrong morals" is correct and usable in written English.
You could use it when referring to a set of beliefs or values that are seen as unacceptably unethical. For example, "The decision was rooted in wrong morals, as it disregarded the rights of those affected."
Does he mean he took a wrong moral turn?
Often the wrong moral note was struck, too.
Oliver Laughland: Do you think the programme will send out the wrong moral message?
The interviewers asked open-ended questions about right and wrong, moral dilemmas and the meaning of life.
M. Shoemaker, a local divine, "and back of the wrong kind of politics is the wrong kind of economics, and back of the wrong kind of economics is the wrong kind of moral standard, and back of the wrong moral standard is unbelief".
To use the language of oppression on behalf of creatures that in their natures must be free to oppress others is surely to be using the wrong moral language.
The mayor, Comte De Reynaud Alfred Molinaa), rules the town -- he often instructs the priest, Pere Henri Hugh O'Conorr), on exactly how sermons should be phrased -- and thinks any behavior that deviates from the abstemious during Lent is absolutely the wrong moral course.
Why is it so hard for smart people who have been around awhile -- Mr. Weill and Mr. Grubman qualify on both counts -- to see that if the road to instant gratification requires taking a wrong moral turn, such a turn is inadvisable?
Between the virtuous and the vicious are the "innocently wrong," people who adopt wrong moral principles or make wrong choices, not through evasion but through an error of judgment (Rand does not explicitly recognize any moral category other than virtue, vice, and moral error, although her novels portray characters that do not easily fit into any of these categories).
Since people want to see themselves as doing right not wrong, moral world views tend to be part of self-definition -- who you most deeply are.
