Good lord, not any effort, just efforts that are, in fact, illegal. Your argument seems to be based on,
"Well these people already get paid a lot, so I don't really see why they should get paid more, even if their wages are being illegally depressed"
you still think they owe you more and need to be coerced to pay you more
The suit is not to "coerce" the companies to pay them more, it's seeking damages for the companies allegedly doing something illegal to pay them less.