I would tend to agree with you; the potential high cost of losing a lawsuit might discourage poor people from suing, even when they have a legitimate case. As it is a poor waitress who has been wronged can hire a lawyer on contingency. But if she knows that she might face tens of thousands of dollars in fees if she loses, she probably just won't risk it.It all depends on how much money there is involved. A low paid waitress that sues her boss for discrimination and looses the case cannot afford to pay all, the fees involved so that is why lawyers work on CONTINGENCY fees.
Of course, I suspect that people like madanthonywayne or ancientregime would argue that she shouldn't sue in the first place if she's going to lose.