I don't think Sayid will suffer at all for exposing Michael. I actually think he may benefit from it. I do not think the action of exposing Michael will be what leads to his tenuous employment under Ben. Ben has to find something Sayid really cares about to manipulate him enough to convince him to work for him...Ben will exploit Nadia and Sayids feelings of guilt just as he exploited Michaels feelings and guilt over Walt and the murders.