If an employer fails to disclose all of the job benefits at the time of employment, is that illegal?

Question Details: My friend works for one of the biggest hospital systems in NJ as a Cath Lab tech. When he was hired, the company failed to disclose that has a clinical ladder; a program that compensates medical professionals who obtains advanced level degrees and certifications. My friend was eligible for additional money from the time he was hired, but because his company failed to disclose this benefit to him, he did not receive the correct wage for many years. Was the negligence by his employer illegal according to state law?
