If voters don't care if she lies, then Congress won't either. And from the responses here, it's clear that the people who support her don't care if she lies. The people who do care about her lies are already opposed to her, and her telling the truth now (for the first time) would probably not win back any support from them.
So the unfortunate truth is that if she ever paid any price for her lies, it's now a sunk cost. She will not pay anything for continuing to lie. And so she will. Even for those who think she is the lesser evil in this election, this should be troubling. But for most of them, it isn't, which is why we're in this mess in the first place.