It's impossible for me to know about what happened to the ex employee. That said, class action seems to be a strategy to bolster the image of the suit by making it more visible.

If it's clear the clams are truthful, then hope the plaintiff prevails. That said, given some people statistically will be overcompensated and others undercompensated as a consequence of imperfect measure and assessment, how can companies guard against this kind of phenomenon which is bound to happen in companies with thousands of employees? That is, if on average things are proper, but individually, some individuals are disadvantaged, what can be done?