Final answer:
True. Pay differences based on merit, seniority, or productivity are allowed under equal pay for equal work legislation, which aims to eradicate wage disparities resulting from gender discrimination.
Step-by-step explanation:
True. Under equal pay for equal work legislation, pay differences based on a valid merit or seniority system, or employee productivity are permitted. This is because these systems are based on individual qualifications and contributions rather than on discriminatory factors such as gender or race. The legislation, including acts like the Equal Pay Act of 1963, aims to eliminate wage disparities specifically caused by gender discrimination, requiring that men and women receive equal pay for the same work in the same establishment. That being said, disparities in pay may still legally exist if they are due to merit, seniority, productivity, or factors other than gender.