(2) Subsection (1) of this section does not apply where: (a) Payment is made pursuant to a seniority or merit system which does not discriminate on the basis of sex, (b) a differential in wages between employees is based in good faith on factors other than sex. No employee shall be reduced in wages in order to eliminate an existing, past or future wage discrimination or to effectuate wage equalization.
(3) No employer shall in any manner discriminate in the payment of wages against any employee because the employee has filed a complaint in a proceeding under this article, or has testified, or is about to testify, or because the employer believes that the employee may testify, in any investigation or proceedings pursuant to this article or in a criminal action pursuant to this article.